The patient’s uterine lining is 1.4cm, usually need to take progesterone for 3~5 days to have menstruation. Endometrium 1.4cm indicates that the endometrium has been relatively thick, you can take progesterone under the guidance of the doctor to promote menstruation. Progesterone is a kind of progesterone, usually take 3~5 days can, after stopping the use of progesterone, the body’s hormone level will drop, can not support the growth of the uterine lining, which will lead to the endometrial lining shedding, the appearance of menstruation. There may be some adverse reactions to taking progesterone, mainly in the form of weight gain or loss, change in the character of cervical discharge, breast swelling, dizziness, nausea, headache, tiredness, insomnia and so on. It is contraindicated for those who are allergic to progesterone, and for patients with breast tumors or genital tumors. Patients with endometrium 1.4cm, to strictly follow the doctor’s instructions to take drugs, progesterone medication time according to each person’s situation is different to be specific judgment, if the body appears to be in discomfort to timely consultation, can not blindly use their own drugs.