LYCOS RETRIEVER 
Ovulation: Hormones
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Ovulation prediction kits are a very popular method of detecting ovulation. One of the benefits of using an OPK (ovulation prediction kit) is that you can predict ovulation before it occurs. With basal body temperature charting you can not tell that you have ovulated until after it happens. OPKs work by detecting LH (Luteinizing Hormone) levels in your urine. Just before ovulation there is a surge in LH. When this LH surge is detected, ovulation should occur within 36 hours.
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Ovulation is the result of a complex interaction of hormones in a relationship termed the "hypothalamic pituitary adrenal axis". The hypothalamus can be thought of as a thermostat that measures, and reacts to, differing hormone levels.
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Ovulation induction refers to the administration of medications to stimulate ovulation. These medications range from oral Clomid to FSH ( gonadotropins ) or combinations of the two. Gonadotropins are injected ovulation stimulating hormones ( FSH ) that are replicas of the hormones produced by the body.
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Ovulation occurs at approximately the same time each month so it is possible to predict the best days for intercourse based upon the charts. The major disadvantages of BBT charting are that the temperature must be taken daily and it is less accurate than urinary hormone measurements.
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The upward shift in temperature after ovulation results from a change in hormone levels. Estrogen, the predominant hormone before ovulation, lowers body temperature. Progesterone, the predominant hormone after ovulation, raises body temperature. If a BBT chart does not show a biphasic pattern, it is unlikely that ovulation is occurring. In this case, ovulation inducing medications such as Clomid are usually recommended. A BBT chart showing a rise in temperature that lasts less than twelve days suggest the the diagnosis of luteal phase deficiency (LPD).
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After ovulation the follicle turns into a corpous luteum, some kind of cyst. Progesterone is released by this corpous luteum, which is essential for preparing the uterus to nurture an egg to fertilization. This hormone is ... responsible for PMS symptoms like breast soreness, water retention, backache, moodiness etc.
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