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I'm wondering why are the levels of oestrogen and progesterone low in the blood during menstruation?
Wow nice question: Long explanation but a brief version. Your menses is an indication that pregnancy did not occur and that your body is now eliminating the lining of your uterus and preparing for a new cycle. It is the decline in estrogen and Progesterone that tells your uterus it is time to shed the lining. The brain starts to stimulate the ovaries in a renewed attempt at getting you pregnant. See image. ...Read more
Hard to say: One would expect low numbers of Progesterone and Estrogen early in the menstrual cycle because that is how the menstrual cycle works. Normally we do not check these particular hormones at this time for this reason. Clarify with the doctor doing the test what it was they were trying to find out. Lh/FSH are better hormones to test if dealing with irregular periods. day 21 Progesterone for ovulation ...Read more
Cycle: Lets say you are on your period, estrogen and Progesterone levels are going to be at it's lowest levels. On the other hand if you were to be mid cycle or late into your cycle your estrogen and Progesterone are going to be elevated, that is to ovulate and get the endometrium ready for implantation. But if you were early post period at the time of blood sampling that could be abnormal. ...Read moreSee 1 more doctor answer
By the follicle: An amazing dance of hormones coordinates the reproductive system. One of the thousands of egg sacs that are in the ovary matures each month during the reproductive years. During the first two weeks of the menstrual cycle, the follicle releases estradiol, a potent estrogen. After releasing its egg, the follicle becomes a corpus luteum and makes Progesterone instead. ...Read moreSee 1 more doctor answer
Let me explain: The normal range of estrogen varies depending upon the patient's age. A female aged 30 to 39 will average a level of 210 pg/ml. Progesterone levels vary considerably from cycle to cycle and woman to woman. The middle of the second half of the cycle Progesterone in a non-pregnant patient is 8 to 10, but can be high as 20 ng/ml. ...Read moreSee 2 more doctor answers
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