Progesterone means 'for pregnancy'. Why is it called so?

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Progesterone helps in the production and ejection of the milk from the mammary glands.

Progesterone prepares the uterine endometrium for implantation and then maintains it.

A high level of progesterone ensures that the uterine myometrium is contracted and that the cervix is opened.

Low levels of progesterone maintains endometrium whereas high levels of it cause menstruation.

answer is B.

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Detailed Solution

The corpus luteum secretes large amounts of progesterone which is essential for maintenance of the endometrium. Such an endometrium is necessary for implantation of the fertilised ovum and other events of pregnancy. Hence, it is called the pregnancy hormone.High levels of progesteron maintains endometrium. Waning of progesteron causes menstruation.Progesteron prepares mammary glands for the lactation during pregnancy. Ejection of milk is due to oxytocin.A high level of progesterone ensures that the uterine myometrium is relaxed and that the cervix is tightly closed.

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