Fetal arrest usually means that the fetus stops developing and most of the progesterone values in the body will have decreased.
After pregnancy, there will be a significant increase in progesterone, and in the early stages of pregnancy, progesterone will usually remain above 25ng/ml. If there is a fetal abruption, the progesterone level in the body will drop to a certain extent.
After the third trimester of pregnancy, the placenta is formed, and the progesterone that sustains the fetus is mainly secreted by the placenta, so if there is a preeclampsia or an abruption, the level of human chorionic gonadotropin and progesterone in the body will drop significantly, so it is necessary to pay attention to it.
Usually pregnant women should be relaxed, the regular situation of the hospital for obstetric examination, if there is a situation of embryonic abortion, need to give the corresponding treatment.