Pregnancy is a joyful event, but some pregnant women experience embryonic abortion after the first trimester, which makes many women especially worried, so why would the phenomenon of abortion occur in the first trimester, and how to determine abortion? In the early stages of pregnancy, women will generally have pregnancy reactions, which are related to the increase of HCG after pregnancy. If there is embryonic abortion, all pregnancy reactions of pregnant mothers will gradually disappear, such as nausea and vomiting will gradually disappear, and the feeling of rising breasts will gradually decrease, and it will usually be accompanied by a feeling of lower abdominal cramping or lower abdominal pain, and some pregnant mothers will also have abnormal vaginal bleeding, all these phenomena mean that If the above symptoms occur, you must pay attention to them and go to the hospital for examination. If the abortion is only preterm, you can take appropriate fetal preservation treatment, but if embryonic abortion has been detected, you need to expel the embryonic tissue in time. For the first time conception or the first occurrence of embryonic abortion, there is no need to be nervous, embryonic abortion is the product of natural selection of nature’s superiority and inferiority and does not affect its next normal pregnancy, but if the pregnant mother continues the process of embryonic abortion for 2 or more times, she needs to go to the hospital in time for examination to find out the cause of embryonic abortion. There are many reasons for the occurrence of embryonic abortion, such as exposure to harmful substances in early pregnancy, female endocrine disorders, chromosomal abnormalities of sperm or egg, immune factors, and abnormal morphology of the uterine cavity. Each stage of a woman’s pregnancy is worthy of attention. Pregnant mothers must maintain a good mood, eat reasonably and exercise properly to have a healthy baby.