LYCOS RETRIEVER 
Ovulation: Eggs
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Ovulation is part of a complex series of hormonal events that begins with egg recruitment and culminates with the release of the egg from the ovarian follicle. Ovulation typically begins at puberty and ends with menopause. A female's ovary contains her entire lifetime supply of eggs at birth. The eggs develop within the ovarian follicles during each monthly menstrual cycle. Rarely, a woman is born with no ovaries and donor egg IVF is the only option for achieving pregnancy.
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Ovulation is the release of a mature egg (ovum) from the ovarian follicle. Each menstrual cycle, several ovarian follicles begin to mature and develop under the influence of pituitary hormones. Usually only one follicle develops fully. While the other follicles recede, this dominant follicle produces an egg which will be released and which can be fertilized. The growing follicle secretes increasing amounts of the hormone estrogen. Following peak estrogen production, there is a surge of luteinizing hormone (LH).
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Ovulation occurs every month in "normal" fertile women. A woman is born with her full compliment of eggs at birth and as the menopause approaches they naturally loose their ability to fertilize and develop normally. When the ovaries cease to function it is termed "ovarian failure" and when they are losing their capacity to produce viable eggs it is termed "diminished ovarian reserve". Premature ovarian failure occurs prior to the menopause and can have a genetic, autoimmune, or unknown cause.
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Ovulation induction involves stimulating the ovary to produce one or more eggs. Female infertility is often a result of woman’s failure to ovulate, failure to ovulate regularly, or failure to ovulate healthy eggs. The cells around the egg that secrete female hormones into a woman’s bloodstream as the egg matures may not always function properly. Sometimes the amount of hormones secreted may not be sufficient to properly prepare the uterine lining so that it will be receptive to a fertilized egg, or embryo. This can result in repeated pregnancy loss. Ovulation induction is often used to correct this cause of infertility when other reasons for recurrent miscarriage are not identified.
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Ovulation is regulated by special hormones that are released by different parts of your body. Your brain contains hormones that stimulate the growth and development of your eggs. Your ovaries contain female sex hormones like estrogen and progesterone, which help to release eggs during ovulation. It is the interplay between these hormones that triggers ovulation and menstruation.
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Ovulation is the release of a single, mature egg from a follicle that developed in the ovary. Ovulation usually occurs regularly, around day 14 of a 28-day menstrual cycle. Once released, the egg is capable of being fertilised for 12 to 48 hours before it begins to disintegrate. This is the most fertile period of your cycle. During ovulation your chances of conception are highest.
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