Why does a sharp fall in progesterone towards the end of a cycle lead to a period?

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Question

Why does a sharp fall in progesterone towards the end of a cycle lead to a period?

Accepted Answer

The uterus lining is no longer maintained, so it breaks down and is lost — Award 1 mark. Progesterone's role is to keep the thickened lining in place; removing that support causes the lining to shed, which is menstruation.

Answer

The uterus lining is no longer maintained, so it breaks down and is lost

Answer

Progesterone directly destroys any egg left in the oviduct

Answer

The ovaries stop producing eggs for the rest of the woman's life

Answer

The pituitary gland stops releasing hormones altogether

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