After sperm and egg meet and combine, they form a fertilized egg, which further develops into an embryo. However, after the fertilized egg is formed, it will not accept the invasion of other sperm and will not ovulate again. But will menstruation occur in the first month of pregnancy?
After pregnancy, due to the increase of estrogen and progesterone, pregnant women generally do not experience menstruation. Therefore, even in the first month of pregnancy, menstruation will not occur. Some pregnant women may notice bleeding in the vagina during the first month of pregnancy, thinking they are menstruating. However, this is actually a symptom of abnormal vaginal bleeding and should be taken seriously by pregnant women.
Discovering vaginal miscarriage after pregnancy may be a result of biochemical pregnancy. Biochemical pregnancy refers to the occurrence of abnormalities during the implantation process after the formation of a fertilized egg, resulting in the failure of implantation. When pregnant women check for HCG, they may find that the HCG value is low and does not show a doubling trend, and the gestational sac cannot be seen through ultrasound examination. Some pregnant women initially use early pregnancy test strips to detect their pregnancy, but suddenly experience vaginal bleeding and then test negative with the test strips, which is called biochemical pregnancy.
In addition, a common cause of vaginal bleeding is threatened miscarriage. The amount of bleeding from threatened miscarriage generally does not exceed normal menstrual flow. After threatened miscarriage occurs, pregnant women should first test their HCG values. If the HCG doubling is normal and the embryo detected by ultrasound is also growing normally, active fetal protection treatment can be carried out.
