What is the biological basis of the effect of oestrogen/progesterone contraceptive pills? - basis of oestrogen progesterone pill
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In the field of applied biology,
Thursday, February 4, 2010
Basis Of Oestrogen Progesterone Pill What Is The Biological Basis Of The Effect Of Oestrogen/progesterone Contraceptive Pills?
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To understand the biological basis of the effect of the pill, we must consider the effects of hormones at different phases during a menstrual cycle.
It is clear that contraceptives tend to end the cycle will be excreted hormones to stop ..... Therefore, we need this early hormonal changes (more seen as a cycle) and then try to understand what could have caused that ovulation does not happen ....... Let me describe gradually, step by step ......
Effect of hormones in different phases: There are two types of contraceptives ... (The guy you mentioned is a 1)
1. Combined oral contraceptives (OC) -> These pills controls the secretion of the hormone feedback function normally during a menstrual cycle. With the combination of estrogen and synthetic progesterone.
They are taken daily have 21 days, and tend to increase the normal amount of hormones in the blood, so that FSH secretion is completely inhibited. Therefore, do not develop eggs.
Sugar pills are taken for 7 dayss, long enough to experience menstruation, but not enough for eggs to develop.
2. Progesterone PADS -> for 21 days. The pill works by thickening the cervical mucus and thickening of the endometrium.
These pills are less reliable than the combined first and must be taken at a time, every day.
However, it is safer for older women and nursing mothers.
A2-Level Guide (Ed. 2008, published Biozone, UK), page 231
Senior BYT BIOLOGY. Greenwood, Ph.D.
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