Will taking progesterone definitely cause menstruation?

Patient's question:

I have irregular periods, and my endometrium is 0.7. I took progesterone for five days, and today I stopped taking it for five days, but my period still hasn't come. What should I do? Does taking progesterone guarantee that my period will come?

Doctor's answer:

When a woman experiences recurring menstrual irregularities, taking progesterone orally does not necessarily lead to menstruation. Especially when a woman has a thin endometrium, it indicates insufficient estrogen levels in the body. In such cases, taking progesterone alone will not result in menstruation after stopping the medication. Your endometrium is only 0.7 mm, which could be the reason for your lack of menstruation.
It is recommended that you first take {yao-Clomiphene Citrate-} orally to promote endometrial growth. Starting from the 16th day of taking the medication, continue to add progesterone for 11 consecutive days. After stopping the medication, menstruation should occur.

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