What is the cause of bleeding in the third month of pregnancy?

The first three months of pregnancy are considered the early stage of pregnancy, and the fetus is generally not very stable in the early stage of pregnancy, so it is particularly prone to occur. Symptoms of bleeding in early pregnancy. If bleeding occurs during the third month of pregnancy, pregnant women must pay attention to it. Such a situation is related to many factors, and it is very important to take timely measures to regulate it. So what is the cause of bleeding in the third trimester of pregnancy? Learn more.

1. Physiological bleeding After conception, during the implantation and development of the gestational sac, the small blood vessels of the uterine decidua may be damaged, which is a physiological bleeding. It is often self-limiting and will stop automatically after a period of time. During this period, pay attention to nutritional supplements and rest in bed more often.

2. Threatened abortion Threatened abortion refers to a disease in which a small amount of vaginal bleeding occurs in early pregnancy, which comes and goes, accompanied by mild lower abdominal pain and back pain. It may result in miscarriage, or it may continue the pregnancy after appropriate treatment. It is mainly due to the weak constitution of pregnant women, or caused by fatigue or trauma (including improper vaginal examination and sexual intercourse). 3. Ectopic pregnancy: When the gestational sac does not implant in the uterus, but implants in the wrong position outside the uterus, it will develop to a certain extent, causing the fallopian tube wall to rupture and lead to bleeding. This type of bleeding remains in the abdominal cavity, and the amount of bleeding through the vagina may not be much, but the consequences are often serious, often resulting in syncope, shock, etc. If not treated in time, it may cause the patient's death. Vaginal B-ultrasound can be used to find the gestational sac and determine whether there is an ectopic pregnancy.

4. Molar pregnancy Molar pregnancy miscarriage usually begins 2-3 months after amenorrhea. This type of bleeding after pregnancy is mostly intermittent with small amounts of bleeding, but some may have repeated heavy bleeding. It is recommended to have an early pregnancy test in the hospital in the early stages of pregnancy to promptly diagnose and rule out the possibility of ectopic pregnancy and hydatidiform mole.