See below: When you start your menstrual period, a new egg is developing into a follicle or cyst. This cyst produces estrogen which makes your lining grow. About 2 weeks later, your egg releases. The cyst now produces progesterone. If you dont get pregnant the Progesterone decreases and you start a new menstrual period. If pos pregnant, then no period.
Answered 6/30/2014
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3 doctors weighed in across 2 answers
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A doctor has provided 1 answer
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