The Menstrual Cycle

Oct 29th 2013 at 2:24 AM

The hypothalamus and pituitary gland in the brain, leading to coordinate processes that regulate ovulation and menstruation

"Most women have about 300,000 eggs in the ovaries at puberty.

For every egg that matures and is released (ovulated) during the menstrual cycle, at least 500-1000 not fully ripen and are reabsorbed by the body, "explains the doctor.

When a woman reaches menopause, which generally occurs between 40 and 56 years old, only a few remaining ova

These remaining eggs generally do not respond well to the secretion of FSH and LH from the pituitary and the levels of these hormones in the bloodstream increase in order to stimulate the ovaries.

A high level of FSH in the blood on the third day of the menstrual cycle suggests that the ovary is not responding normally to signals from the pituitary. "

This lack of ovarian response is indirect evidence of poor egg quality.

Decreased ovarian response to FSH and LH from the pituitary results in low in estrogen and progesterone produced by the ovary, "said the doctor, who coordinates the Specialization Course in Reproductive

Medicine, administered by the Institute of Education and Research of the Syrian-Lebanese Hospital, in São Paulo

Gradually, the menstrual cycle becomes smaller and eventually the ovaries may not release an egg, resulting in a cycle without ovulation.

"Furthermore, hormones - estrogen and progesterone - are critical for normal development of the endometrial, where the embryo to develop to settle. A reduction in ovarian hormones that occurs with age also helps to reduce the chances of pregnancy, "he concludes.

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