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What causes the breakdown of the uterine lining if the implantationof a zygote does not occur?
Wiki User
∙ 12y ago
As part of the menstrual cycle, the engrossing of the uterus is due to the production of progesterone in the ovaries (induced by LH), the drop in progesterone during the last days of the cycle due to the degeneration of the corpus luteum is what triggers the menstruation.
If a zygote implants in the endometrium, it starts producing hCG, a hormone that stops the degeneration of the corpus luteum so progesterone levels don't drop.
As such, if the zygote doesn't implant itself in the uterus, the cycle keeps going, the pituitary gland lowers production of LH, produces more FSH, corpus luteum degenerates, progesterone levels lower, strogens rise and menstruation occurs
Wiki User
∙ 12y ago
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The breakdown and discharge of the uterine lining out of the vagina causes?
It causes menstruation (aka period). ~Karen~
What causes breakdown of uterus lining?
When an egg is not fertilized by sperm, this causes the breakdown of the uterus lining. It is known as menstruation.
What hormone secreted by the ovaries encourages the rebuild of the uterine lining?
The hormone secreted by the ovaries that encourages the rebuild of the uterine lining is estrogen. This hormone plays a crucial role in the menstrual cycle, stimulating the thickening of the uterine lining in preparation for potential implantation of a fertilized egg.
What structure releases progesterone to increase the vascularity of the uterine lining?
the ovaries
Which hormones are at their highest levels in the blood when the uterine lining is the thickest?
Progesterone
The breakdown and discharge of the uterine lining out of the vagina causes?
It causes menstruation (aka period). ~Karen~
When which hormone falls it causes the uterus lining to breakdown?
The uterine lining begins to breakdown when the egg of a female is not fertilized by the sperm of a male. This occurs on day one of the menstrual cycle.
What causes breakdown of uterus lining?
When an egg is not fertilized by sperm, this causes the breakdown of the uterus lining. It is known as menstruation.
Why do women stop having periods during pregnancy?
Your period is the breakdown of the uterine lining. Once a pregnancy is established by the embryo implanting in the uterine lining, the hormone hCG and progesterone kick in to prevent the breakdown. While pregnant the lining does not break down because it is being used to support the placenta and fetus.
What causes tears in uterine lining during period?
Having a baby
Is thickening the endometrium the main function of progesterone during menstrual cycle?
Yes, thickening of the uterine lining is one of the main functions of progesterone during the menstrual cycle, allowing the womb to build-up the uterine lining to support a fertilised egg. If pregnancy doesn't occur then it's the drop in progesterone that causes the uterine lining to break down.
Why does a womens uterus thicken?
Progestrone causes the uterine lining to thicken in preparation of a fertilized egg. If no egg is fertilized, the thick lining is shed as a menstrual cycle.
How menstruation happens?
If the egg fails to get fertilized by a sperm it has to be expelled and this process is started by the lowering of progesterone and estrogen levels that causes the uterus lining to break down and release a compound named prostaglandins. Prostaglandins causes the contraction of the uterine muscles that causes the breakdown of the egg and further contractions cause it to expelled through the vagina.
What hormones regulate the uterine lining?
in bahi
The shedding of the uterine lining is referred to as?
menstruation
When does uterine lining break down?
unsa?
How is the uterine lining maintained during pregnancy?
One of the major hormones of pregnancy, estrogen helps maintain the endometrial lining of the uterus. Additionally, progesterone will also help to maintain the uterine lining.
