Normal menstruation but pregnant for 4 months

Normally, women do not have their periods when they are pregnant, but some people find themselves pregnant during their menstrual period and their menstrual flow is normal. This symptom is not abnormal. If you are really pregnant, the bleeding may not be menstruation, and there is also the possibility of miscarriage. If it is menstruation, then the pregnancy may be incorrect. So, what is the reason for being pregnant for 4 months even though menstruation is normal?

It may be due to physical factors that menstruation occurs in early pregnancy. Menstruation is the bleeding caused by the necrosis and shedding of the uterine wall after ovulation. To a certain extent, menstruation is a woman's uterus preparing for pregnancy in advance. Under normal circumstances, if the sperm and egg combine successfully and the embryo implants into the uterine wall, the woman will not ovulate, and this kind of preparation is no longer necessary. Therefore, during pregnancy, the menstrual period will generally stop.

Normal menstruation occurs when the corpus luteum life cycle ends after ovulation, female hormones and estrogen withdraw, and the functional layer of the uterine wall wrinkles and necrotizes and bleeds. Therefore, when the sperm and egg combine successfully and the embryo implants in the uterine wall, the corpus luteum continues to grow into gestational progesterone, maintaining pregnancy. Women will not ovulate and will not have menstruation.

However, during the process of sperm and egg combination and embryo implantation, a small amount of uterine wall may fall off and be discharged, causing vaginal bleeding, which causes some pregnant women to think they have their period. There are also cases in the early stages of pregnancy where low estrogen levels may lead to threatened miscarriage and vaginal bleeding, which some pregnant women mistakenly think is their menstrual period.

Under normal circumstances, this type of menstrual flow is usually less and lasts for a shorter period of time. After three months of pregnancy, the embryo is formed and the body's estrogen and progesterone levels remain at a high level. At this time, the uterine wall no longer falls off, and the so-called menstrual period is not easy. However, some pregnant women, if they have cervical erosion, cervical polyps or cervical lesions, will have repeated bleeding and it is also considered to be the arrival of menstruation. Therefore, when encountering this situation, you should check the cervix to eliminate cervical diseases.

Because the embryo implantation is not stable, the embryo has not yet been produced, and it is close to or has arrived at the menstrual day, and a perfect egg cell will be discharged, and then fall out of the body along the uterine wall, which leads to a small number of pregnant women thinking that they are having their period. In addition, this kind of situation is not physiological bleeding and should be treated promptly.