Among the main causes of early miscarriage, embryonic and fetal chromosomal abnormalities are the main cause, accounting for about 50-60%. For this part of miscarriage, as we all know, following the result of natural elimination of the superior and inferior, it is not beneficial for us to supplement more progesterone, so for the first pregnancy with preeclampsia, it is mostly considered to be due to natural elimination and no overly aggressive treatment is needed. The current indications for fetal preservation are still based on the manifestations of preterm abortion, such as history of menopause, vaginal bleeding, presence or absence of abdominal pain, uterine size consistent with the week of menopause, and ultrasound suggestive of intrauterine pregnancy, and progesterone (progesterone) therapy can be administered to those with low progesterone levels. Therefore, if you usually have good menstruation and no history of spontaneous abortion, and you find yourself pregnant after menopause, and there is no abdominal pain, vaginal bleeding and other abnormalities, there is no need to check serum βhCG and progesterone. If serum βhCG and progesterone are checked, and the progesterone value is not that high, but >5ng/ml, there is no need to be nervous, and there is no need to use progesterone for fetal preservation. For patients with recurrent miscarriage with endocrine abnormalities, active treatment should be provided for the underlying disease, for example, ovulation can be induced by clomiphene in luteal insufficiency, and hCG and progesterone should be given to enhance luteal function during the luteal phase.