Home
Yoga to strengthen women's lifeEveryone expects from a women for all their necessities. The husband needs to go to office and she has to prepare for this, the son or daughter needs to go to school, tiffin needs to be packed, and the in-laws need her attention for the morning tea and breakfast. Along with this she has to rush to office on time. Then while returning, she has buy vegetables and other things for household, then go home and cook, and sleep late after all the chores are done. For such a multi-tasking working-women, the time available is very less to replenish the energy she uses to do such work. Multitasking leads to stress and tension and causes headaches, stiff neck, tight shoulders, poor posture, shortness of breath, clenched teeth and fatigue. What is the solution for this? The only solution is YOGA.  We all know that yoga has many positive effects on ones well-being; it brings about both physiological and psychological benefits. It is beneficial for body, mind, and spirit. It needs only 10 minutes. Yoga helps to relieve your stress and tension. Yoga in Sanskrit means 'YOG' that is to join or unite. It is the union of mind, body, spirit, and breath with our surroundings and our universe. One should start yoga gradually with a comfortable speed and limits. Breathing exercises are excellent way to reduce stress and tension. It can be done along with asanas. For this you have to sit comfortably with relaxed shoulders and with your chin level at the floor. Inhale through the nose expanding your abdomen, rib cage, then expand your chest, then begin to exhale by contracting your abdomen, ribs and then lastly relax your chest. Now continue to breath in this fashion, this improves the quality and quantity of oxygen that enters our body and helps to relieve the shortness of breath and relieves the tension. The yoga mudra is helpful to relieve the stress, for this sit down crossed legged on the mat and keep the back straight, then take the arms behind your back and hold the left wrist with the right hand. Then by exhaling, bend forward to touch your left knee, while doing this focus on the feeling of surrendering to God, which protects you all the time, then while inhaling come back to the normal position and repeat this on the right side. Then finally, complete this pose by touching the forehead to the ground in front in the centre, while doing this exhale, then when you feel like inhaling come back to the normal position. This posture increases the energy and stimulates your respiration, improves your digestion calms your nerves. But this should be avoided by pregnant women, hernia patients, and patients with retinal disorder. The shavasana also helps you to relax your body before you get to work. In this you have to lie down on your back on the mat. Keep your arms a foot away from your body and your feet separated two feet apart.  Then close your eyes and focus on your breathing and feel free of thoughts and tension. Breathe normally and focus on your body parts, toes, legs, abdomen, head and finally the scalp and try to relax each muscle group. It improves your breathing, concentration, gives inner peace. You should avoid this if you are suffering from low blood pressure.  
Smell like roses, without the thornsYou bathe regularly and use the best possible deodorants, underarm anti-perspirants, panty perfume but the bad odour just doesn't go away. Pat yourself dry Very often you have a leisurely bath with scented bubbles and what not but when it comes to drying your body thoroughly, well you just pat yourself quickly, for you are in a hurry. The moisture on your body then attracts bacteria with fungi and they cause that embarrassing mouldy kind of stench on your body. So make sure you dab yourself thoroughly dry all over your body. Especially in places like the lower back where it is difficult to reach without some really flexible shoulder joints. Use the archer's swipe (The towel extended between the right hand over the head with  the left hand extended back to form the bottom grip, which looks like an archer reaching for a bow from the quiver). In case you are endowed with love handles and folds of fat then be generous with the patting, as those are the parts most susceptible to host bacteria. Change clothes often If you wear the same set of clothes and lingerie then you are surely going to have an odour which is lingering. So for those ladies who occasionly wear the same set of clothes without washing, the sweat is going to accumulate in there and raise a stink. Remember the Celine Dion song? It's a new day, a new start! Menstruation + Stress = Bad smell There is nothing that you can really do about your periods. Instead, try and be a little more extra careful during those 4 days. You can have an extra jab at the deo bottle or perfume lotion. However stress, nervousness and fear also leave chemical traces which come out along with the sweat. This adds to the bad odour. Humble pie for dessert? What you eat also affects the way you smell. Go easy on the garlic, onion rings and fish for they can make you smell slightly worse than an open sewer. Always rinse your mouth after eating and use a good minty mouthwash if at all you choose to pepper your meal with onion and garlic to ward offthe evil eye. You can add conditions like diabetes to cause a fruity kind of odour. Well in that case make sure you exercise regularly so that the skin sweats out the toxins. In case you are the extra-sweaty types then use medicated soaps or ensure you use steam baths regularly to keep your skin pores open.
Your child is ready for school... but are you?It was still okay. Just 2-3 hours which you could utilize for other things while your child was away briefly. Now you will have to compete along with teachers, textbooks and homework for your child's attention. Well Mother, we know this is going to be difficult for you, but let's see if we can try and make it any easier. Think of school as an extension of the tender loving care that you provided. The only difference is that the TLC will go towards nurturing and developing his/her brain and help it learn important skills which will help gain a balanced development. At this point your child feels bad and completely unsafe in this new hostile world of teachers and uniforms and what not! If you weaken at this point your child will cop on and then will come the emotional blackmail. So explain the importance of school to your child as it will make the transition easier. It is always good for mothers to accompany their children to school but imagine watching mother walk away and all hell can break loose. So if your child's school has a school bus facility you can walk him to the bus stop and then say your goodbyes there. A lump in the throat at the bus stop is preferable any day than a scene at school with a child holding on to mother for dear life. Do not criticize your child's school or assignments given by them as children can catch on quite quickly and that can be reason enough for them not to concentrate on school activities. Always encourage your child to talk about what he did at school and ask him questions about his friends and teachers. This gives the impression that school is as important as home and gradually even you will reconcile yourself to the fact that school is here to stay.
Is circumcision a healthy ritual?Religious rituals and practices have been carried out since ancient times. Circumcision is a religious ritual that involves surgical removal of the prepuce of the human penis. Prepuce is the foreskin of the penis and during the procedure; the person performing the ritual opens, inspects and separates it from the glans. The process is painful and hence local or topical anesthesia is used to reduce physiological stress and pain. Circumcision is performed for religious as well as personal reasons and many times recommended medically for prophylactic or therapeutic reasons as well. Today's medical science makes use of this treatment for treating chronic urinary tract infections, refractory balanoposthitis and pathological phimosis. Circumcision is performed as ritual in many parts of the world. However, it is also recommended medically as protection against HIV infection. Circumcision-Is it Legal and Ethical? In the world over, the ritual or practice of circumcision is carried out on all types of people from neonatal stage to adulthood. While no significant risks have been noticed due to the practice of this ritual, rather some modest health benefits have come to the fore. The World Health Organization has recommended circumcision for male infants in parts of Africa where the children are more vulnerable to urinary tract infections. However, no other medical organization in the world has supported or banned the procedure. Over past few years, legal and ethical questions have been making rounds and many believe that consent should be taken before carrying out neonatal circumcision. HIV and Circumcision Benefits A Cochrane meta-analysis conducted in 2009 on sexually active African men have revealed that the ritual of circumcision reduces the risk rate of HIV infection by 38 to 66 percent among heterosexual men in a period of 24 months. That is why WHO has recommended circumcision in sub-Saharan African areas having high rates of HIV infection as a part of the comprehensive HIV program. Moreover, this process is more cost-effective as compared to other treatments and preventive measures recommended for HIV. Circumcision reduces the risk rate of HSV-2 infections and oncogenic HPV prevalence along with the risk of penile cancer and UTIs. Until now, there have been no concluding reports on the protective effects circumcision offers against other types of sexually transmitted infections. Circumcision is also recommended medically to children suffering from pathological phimosis and refractory balanoposthitis. Contraindications The literature worldwide review conducted in 2010 reveals that around 1.5 percent of the newborns face median complication when the process of circumcision is performed by trained medical providers. Only 6 percent children face severe complications with the common complications being infection, bleeding or removal of too little or too much of foreskin. However, the process does not cause any negative impact on the sexual functioning of an individual. Contraindications due to circumcision are also cited in infants having genital structure abnormalities right from the birth such as misplaced urethral opening, ambiguous genitalia or chordae. In such cases, the foreskin may require reconstruction through surgery.  It is contraindicated in premature babies and clinically unstable infants and it should also be avoided in children with family history of hemophilia (bleeding disorders). In such patients, it is important that the blood should be checked for its coagulation properties before attempting the procedure.
Algophobia: The fear of painAlgophobia is the fear of pain:  an abnormal and consistent feeling that is far beyond what would be considered normal. The term is derived from the Greek words, Algos meaning pain and Phobos meaning fear. Our bodies are designed in a way that when there is a painful stimulus it reacts. How the body reacts to the pain is an individualistic phenomenon. Some people have a very low threshold for pain, and even the slightest pain evokes a huge response in them. Where as others can withstand a good amount of physical pain before their bodies give in. Some people dread even the tiniest amount of pain. They foresee situations that will cause pain in them. The way they react to even the smallest amount of pain is far more than the normal level of acceptance. Such people are said to be suffering from Algophobia. Algophobia is a learned behaviour, say behavioral psychologists. For example you may have heard from several people how hitting your shin on the furniture in the dark is the worst possible pain ever. So you tend to keep a watch and if it is dark, you move around extra-carefully to avoid bumping into the furniture and getting hurt. This would be considered normal, cautious behaviour. But if the same thought keeps buzzing in your head continuously and you go to extreme lengths to avoid that pain, you could be algophobic. Old people are the ones who have excessive fear. The age factor along with fear of death plays a vital role in old people developing this fear. For example an old lady may hear about all the ailments and pains that afflict old age people and may become apprehensive about it. She may develop irrational fears that more often than not, are also imaginary. She may start experiencing the pains even before anything actually happens to her. It may seem unrealistic to a normal person, but for algophobics pain can be a severely dreaded thing. Therefore they will go to great lengths to avoid pain at all levels, including day-to-day activities. They will not go into the dark, handle tools, avoid lifting heavy objects or even avoid playing any type of contact sports. If a task has a scope for injury and pain, they will avoid it! Frequently a pathological complaint of Hyperalgesia occurs along with algophobia. Hyperalgesia is a condition of increased sensitivity to pain due to damage to the peripheral nerves and pain receptors. Pain in such cases may be directly in the damaged tissues or in the surrounding areas. An interesting fact is that hyperalgesia can occur due to long term use of painkillers especially strong ones like opium and its derivatives. Algophobia is treated with behavioural therapy, psychotherapy and anti-anxiety medications. Hypnotherapy also has shown beneficial effects.  
Be positive. Here's howAs someone so very rightly said, "We are the sum total of our thoughts". So the more positive thoughts you have, or are capable of thinking, the more positive will be the outcome of your life journey. Here are a few tips to think more positively and empower yourself: Have a daily positive thinking routine. Generally the time when you are just waking up, i.e., the half awake state, is best for you to start feeding positive thoughts about yourself. The mind is more accepting of suggestion at that time. You can just feed your brain with happy and positive thoughts about your situation and what you hope to achieve for yourself and your family. Creative positive visualization is another great method of positive thinking. At a set time, just picture your life in the way you want it to go. This is different from daydreaming. Creative visualization gears you up for action while daydreaming remains just wishful thinking. If you have difficulty in certain areas of your life, say at work or with your relationship, visualize a positive outcome. This will engage your mind in thinking of various action plans to get about that positive result. Positive affirmations are a great way of reminding yourself that all is well. Have patience with yourself as your mind will probably not even believe half the things that you are affirming. That's what affirmations are all about.They are statements that you feed your mind about what you are and what you can achieve. Positive affirmations can help you reprogram your mind to what your heart really desires. Let go. Feel that delicious sense of surrender as you just indulge in mentally letting go of things. As a busy person you probably end up trying to control the outcomes of every situation and feel bad when things don't go the way you expect them to. Remember things can go wrong from time to time. Like you, life is also not perfect, so why expect perfection from others? Learn to let go of that emotional baggage that you are carrying. The weight of the world needn't rest on your shoulders. Collective consciousness is where you should try to tap into. Think of situations where things can go horribly wrong for someone else. Send out a silent prayer for those unfortunate people in this world. Chances are that your prayers just might help some stranger badly in need of a prayer or two. This can only come back to you manifold. Help someone else become a positive person. This can only reaffirm your faith in positive thinking. Positive energy is what everyone naturally seeks and we can for sometime blame our friends or family for being a negative influence on our lives. This line of thinking will get you nowhere. Instead think what's the next best option? Think of how you can convert negative energy or experiences into positive ones. Initially you might meet with resistance, but remember if you are positive then positivity is yours for keeps.
High heels can walk you to the hospital bedHigh heels make a fashion statement which makes us look tall, elegant and good but they cause injuries on a regular basis. High heel shoes have been luxury item once upon a time; today high heels have made themselves a part of every girl's life thanks to supermodels and stars. You will not find any health warning on shoes but they ought to, as they seriously put you at a high risk of numerous health problems. How are high heels and low back painrelated? High heels significantly affect your natural posture and your spine. The natural arch of spine becomes acute when walking in high heels. This poses high risk to the spine getting injured. This not only wears  and tears intervertebral cushions called discs but cause injury to the nerves too.  High heels put strain on muscles of lower back causing pain after a long day of wearing high heels. Nerve trapping, nerve pain and radiculopathy can result from wearing high heels for a long period. This is exhibited     as tingling, numbnessand pain. Arthritis, nerve pain, hammer toes, ingrown toenails and bunions are all common problems due to high heels. Calf muscle shortens and tightens after prolonged use. Jogging, playing, running with high-heeled shoes can tear and rupture calf muscles. What can you do to prevent damage? Firstly ensure your body is in top shape before you start. There is a much less chance of developing low back pain if you are strong and fit. So do activities like swimming, pilates, circuit class, box-exercise and whatever else thatmakes you feel good. Focus on activities that make the abdominal area strong includingyour deep core muscles. Secondly a regular regime of stretching will prevent a lot of problems occurring. Either get involved in a yoga class or make sure you do 10-15 minutes of stretching every day. Stretch your back, your calves and hamstrings especially. Thirdly get sports massage at leastonce-a-month. This will loosen the tightened structures, realign the spine and lengthen the hamstrings, calves and Achillestendon
Arthritis friendly workoutsRheumatoid arthritis is more common in women over 60, and is the inflammatory type of arthritis where the synovial fluid functioning is disrupted. The synovial fluid maintains the health of joints, bones, and cartilages. Osteoarthritis is the most commonly occurring type in both men and women, and in this type there is gradual wearing away of the bone cartilages, which, in turn, causes stiffness, and pain in the muscles, joints and tendons. There is a classic catch 22 situation in arthritic patients and that is they avoid exercise or are advised extreme caution while exercising. The pain and soreness which comes from exercising can be extremely discouraging, so some shun exercise altogether. Now, the lack of exercise is going to precipitate the condition further, and could even increase the soreness, and lead to deformity. This is what challenges most arthritic patients. Should someone with arthritis be allowed to exercise? And if yes, then what type of exercise will prove to be most beneficial? Main question is: Are there any arthritis friendly workouts? Doctors now recommend that exercising could actually work wonders for arthritis patients. The right method and type of exercise can help ease the inflammation and soreness of the joints, and build overall health, strength and flexibility of the bones, and joints as well. What would be a good exercise routine? The arthritis foundation recommends routines which exercise the flexibility of the joints, and build muscle mass, for better shock absorption, coupled with physical endurance should be specially designed for arthritics. Regular walking: Walking is a great exercise for arthritics. Walking at a steady pace for about 30 minutes, thrice a week, can help keep the limbs active, and could reduce the swelling at the knees, and hip joints. Warm up is absolutely essential in any work out, and here it is of paramount importance that you go through a warm up routine before you begin your walk. Simple leg raises, hand to toe stretches, and light back bends can be done to warm up the muscles and joints for your walking activity. That will also reduce the possibilities of strain or sprains of the ankles along the way. Choose your exercise route to ensure that you don't walk up a gradient, and put unnecessary pressure on your knees and ligaments. Aquatic Exercises: Exercising in water is perhaps the best possible alternative, as water is absolutely low impact. This is great for arthritic patients to reap the benefits of a swimming pool workout. The easiest for chronic arthritis patients would be to simply walk, or wade in water for about 20-30 minutes. This can help greatly with building strength, and endurance in the extremities. For enhancing co-ordination you can even try walking backwards in water, or simply float and relax the body. Avoid water which is too cold, as that might adversely affect your condition. Stretching and Yoga: All easy stretches for the limbs and joints will be helpful to facilitate ease in movements, and dealing with joint pain. Standing leg raises, shoulder raises, wrist rolls are exercises which can be done quite easily, and can help keep the body supple. Though yoga also enhances flexibility, it goes way beyond just that, and actually aims at harmonizing the life force in the internal and external organs as well. No matter what type of exercise suits you, always remember: Proper warm up exercises are a must for the arthritic patient, as that can help reduce, and eliminate the possibility of injuries while working out. Do not force your body into an exercise regimen, if you are experiencing pain. It is quite ok to take a day off if the joints are sore. Get into an exercise routine slowly as your body might take a little longer to recover from it. Always seek the advice of an expert or a doctor before making any alterations to your regimen.
Advantage of the average - Automated continuous blood pressure monitoring technologyAlthough mercury sphygmomanometers (though a deadline is set for them to be phased out due to environmental concerns) are still considered the gold standards, the Aneroid and Digital counterparts represent the future of blood pressure monitoring. The need of long-term blood pressure monitoring arises with disorders and health conditions that demand more attention from the medical teams. Experts say that the fluctuations in BP in conditions like cardiovascular diseases, pregnancy, etc., if tracked at regular intervals, can reduce 22% of risks due to delay and no treatment. This necessity pushed the invention of invasive arterial blood pressure to be used during surgical procedures and further a continuous noninvasive arterial pressure measurement (CNAP) system. There have been multiple researches to overcome some of the roadblocks in measuring the arterial blood pressure in the noninvasive and external approach. Among these developments, the need for measurement of mean blood pressure was felt and the 24-hour BP variation in the patient was taken into account. The 24-hour model eliminates the errors in readings taken during clinic visits due to factors such as fluctuations as a result of white coat fear or after-effects of some stress or exertion. Trendsetting New-age Technology : In 2004, the medical world received the BpTRU non-invasive automatic blood pressure monitoring device. BpTRU devices proved to be a superior and more precise alternative when compared to other manual BP assessment techniques and even other 24-hour ABPM alternatives. The automated oscillometric devices precision and accuracy of assessed BP and heart rate is earmarked with a unique automatic technique - the device records 6 consecutive BP readings of the patient, discards the earliest, and the rest of the five values are put to average function and instantly the resultant mean BP reading flashes on the screen. Compatible with guidelines of American National Standard/Association for the Advancement of Medical Instrumentation (ANSI/AAMI EC13:2002) this is a time-saving, portable, and user-friendly device. A compact and automatic wrist cuff BP monitor, the smart blood pressure monitor that can be synchronized with with Apple’s iOS devices and a Bluetooth connectable and Android compatible blood pressure monitor marks the revolution of CNAP in modern times.
Bile block - Understanding gallbladder problemsRavi was a young intern working the night shifts in a government hospital when he was asked to examine a patient who had just been brought in. The patient was a 45-year-old, a fat man, who was complaining of pain in the right side of the abdomen along with nausea and vomiting. On inquiry it was revealed that he had eaten a very heavy fat-laden dinner. Remembering what his surgery professor had taught him about cholelithiaisis, Ravi immediately guessed what the diagnosis could be. He, however, sent the patient for a blood test and an abdominal scan. The reports confirmed Ravi’s suspicions- cholelithiasis, gallstones. The gallbladder is a tiny pear shaped organ that lies just below the liver. It is responsible for storing the bile that is produced by the liver for digesting food. It ensures the smooth outflow of the bile from the bile ducts. When the bile components aggregate in the gallbladder, they build up to form gallstones, similar to kidney stones. The gallstones are usually small enough to pass on to the intestines and be eliminated without causing too much trouble. At times, these stones may be big enough to block the outflow of the bile and give rise to a variety of symptoms depending on the size of the stone and severity of the block. The symptoms include -  Intermittent colic. A bloated sensation with constant nausea. Inability to tolerate fats. Vomiting.  Fever with chills if the stone becomes infected. Gall stones though found in both sexes, is more common in females. The risk factors for developing gallstones include - Diabetes. Organ transplant. Diseases like hemolytic anemia, sickle cell anemia. Liver cirrhosis. Failure of the gallbladder to empty properly, e.g., during pregnancy. Rapid weight and nutrition loss due to any reason. Gallstones are confirmed by a blood test to check the liver function and by an abdominal scan. Medications to dissolve the stones, and surgery in case of large stones that do not dissolve with medications, are the treatment options.
Female circumcision - Health EffectsThe procedure is carried out by either snipping off a piece of the clitoris or removal of all external genitalia for non-medical reasons. The procedure is carried out outside hospitals and the environment may not be effectively clean and could lead to infection. The painful procedure causes a lot of fear and distress. Some countries have begun to use healthcare personnel to cut the genitals, which reduces pain, bleeding and infection but it does not mean that it is acceptable by the United Nations. Even though the United Nation has termed female circumcision as a violation of human rights, there are millions of girls suffer because it is a requirement for girls so that they remain pure. It is supposed to lower female libido so that they do not indulge in any kind of sexual activity before marriage. Immediate complicationsGirls are likely to suffer severe pain besides the fear that accompanies such a procedure. It can cause them more pain when they try to urinate. If there is severe bleeding, it can lead to haemorrhage. The tissues that form the genitals are severely damaged and healing may not take place immediately and sores can form leading to more pain. Girls can retain urine for fear of the pain. There is always a chance of contracting tetanus or other bacterial infections like sepsis which lead to formation of pus. Besides cutting, procedures can include pricking, piercing, incising, scraping, and cauterizing the genital area. Long term health problemsBesides the immediate problems, female circumcision can lead to long term effects including infertility. The girls can be subjected to urinary tract infections and bladder infections that can recur again and again. Sometimes cysts may also form. There are chances that there could be increased risk of problems during childbirth which could in extreme cases result in the death of the newborn baby. According to UN estimates more than 125 million girls and women are living with female circumcision. Women may be subjected to continuous surgeries especially in those cases where the vagina has been stitched to make it narrow as part of the circumcision process. Once the girls are married, the vagina is unstitched to have sexual intercourse. During childbirth, the vagina may need to be cut again to deliver the child and then stitched up again. This is a continuous problem and women should be spared from this pain and trauma.
Sex at 50 for womenAs you age, your reflexes slow down. The passion to love and to be loved is never dying and just because you have grown in age, you should not stop enjoying sex. The body, especially in case of women also undergoes many changes after the menopausal period. Although it may take you more time to become aroused but the desire to have sex is always there. Moreover, with no children and no worry of getting pregnant you can enjoy sex uninterrupted without any tension. Women who continue to remain sexually active after their menopause retain their ability for enjoying normal orgasms. But this does not mean that there is no difference in the enjoyment factor. Several factors can be detrimental in continuing sex activity. However, there are solutions that can help the couple in their fifties still enjoy sex. Better sex can be possible even during the fifties but for this, you should be ready to take some extra efforts and make your body more comfortable for sex. Using lubrication After the menopause, the body of a woman starts producing less female hormone-estrogen. Lower estrogen level leads to physical changes such as less elasticity of vagina, dryness in vagina and so on. Your vagina may also take more time to swell and lubricate; in turn making intercourse painful or uncomfortable. Instead of getting discouraged by such occurrence, you should try to find out a remedy for it. For overcoming the dryness of vagina, you can use different sexual lubricants that are specifically prepared for the older women. You get them in suppositories or gel forms, which you apply liberally to the vaginal area before having sex. There are certain vaginal moisturizers also available in the market that makes vaginal penetration easier by maintaining elasticity and lubrication. Increase the frequency The more often you have sex, the easier it is for you to maintain elasticity and lubrication. So, go for it more often to enjoy it more now. Hormonal therapy treatment If you are suffering from distressing menopausal symptoms like hot flushes, you can opt for hormonal therapy treatment. This will help to relieve the vaginal dryness. Some doctors also suggest local intra-vaginal therapy to avoid discomfort and dryness during penetration. Application of local estrogen into the vagina enhances the blood flow to this area and ensures more sensation and lubrication. Intra-vaginal estrogen treatment This treatment is carried out in three different ways: A small ring of silastic is inserted high inside the vagina and is kept there for three months. This ring release estrogen in right amount to promote optimum vaginal health. A small tablet of estrogen is inserted inside the vagina twice in a week. Conjugated estrogen cream is applied with small applicator twice in a week. So, there are different methods for increasing responsiveness, vaginal lubrication and elasticity that help you enjoy sex better even in your fifties. Overcome awareness about your body The body of women in fifties is saggy and wrinkled. However, if you have a young heart and passion for sex, you should not let the body image spoil your enjoyment. It is your response towards your partner that matters the most as both of you are going to age slowly and get more wrinkles as the age progresses. Like someone said, it's the imperfections and not the perfections that we fall in love with.
FAQS
T&C FAQS