What is the biological basis of the effect of oestrogen/progesterone contraceptive pills? - progesterone contraceptive pill
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In the field of applied biology
Progesterone Contraceptive 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 to stop the hormones ..... That is why we need these 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 at different levels: 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 for the secretion of FSH was completely inhibited. Therefore, do not develop eggs.
Are given sugar pills 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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