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How Birth Control Pills Work, Animation

Posted on October 26, 2022 By
Health

(USMLE topics, gynecology) Mechanism of action of the Pill. This video is available for instant download licensing here :

Prevent pregnancy. they contain hormones that   is the combination pill which contains both   progesterone. these 2 hormones interfere with   the menstrual cycle refers to the monthly events   that occur within a woman’s body in preparation  for the possibility of pregnancy. each month,   process called ovulation. at

The same time,   pregnancy. if fertilization does not take place,   the lining of the uterus is shed in menstrual  bleeding and the cycle starts over. the menstrual   secreted by the hypothalamus, pituitary gland,   and ovaries. basically, the hypothalamus produces  gonadotropin-releasing hormone, gnrh; the  

Pituitary secretes follicle-stimulating hormone,  fsh, and luteinizing hormone, lh; while the   ovaries produce estrogen and progesterone. these  hormones are involved in a regulatory network that   results in monthly cyclic changes responsible  the 2 hormones that are required for ovulation  mature egg; and lh, which is responsible

For   ovulation event itself. two other hormones,   estrogen and progesterone, are at high levels  after ovulation, in the second half of the   cycle. they suppress fsh and lh during this time,  preventing the ovaries from releasing more eggs.   if fertilization occurs, estrogen and progesterone  levels remain high

Throughout pregnancy,   providing a continuous suppression of ovulation.  on the other hand, in the absence of pregnancy,   the levels of estrogen and progesterone in   tricking the ovaries into thinking that ovulation  has already occurred; fsh and lh are constantly   the pills are taken every day for three weeks,  

Followed by one week of placebo pills containing  no hormones. during the week of placebos,   estrogen and progesterone levels fall, triggering  a so-called withdrawal bleeding, or fake   indication that fertilization did not happen,   but it is not required for birth control. in fact,  there exist continuous-use contraceptive

Pills   with less or no placebos, resulting in less or no  menstrual periods. these pills are particularly   beneficial for women who suffer from menstrual  disorders such as excessive menstrual bleeding,   for lactating women, or those who cannot   contain only progestin. these are not as   ovulation. their effect

Relies more on the   ability of progestin to promote secretion of a  thick cervical mucus to obstruct sperm entry.

Transcribed from video
How Birth Control Pills Work, Animation By Alila Medical Media

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