Is bleeding normal during pregnancy?

When the pregnancy reaches four weeks, it is still in an unstable period. Pregnant women should not take it lightly at this time to avoid unnecessary problems. Some pregnant women will feel bleeding inside their vagina during this period, but it is not that serious. However, even if the amount of bleeding is relatively small, you should still have a detailed prenatal examination to ensure that your vaginal bleeding is not a sign of threatened abortion.

1. Miscarriage

Populations at risk: Fetal chromosomal abnormalities, maternal hormone disorders, congenital uterine developmental abnormalities or acquired defects, immune system problems, viral infections, pregnant women with chronic diseases (such as heart disease, kidney disease and blood diseases), overwork, excessive stress, too intense sexual life, external impact, environmental pollution, improper use of medication, smoking, drinking, excessive caffeine intake or other foods that promote uterine contractions, etc.

Before the placenta is fully formed, embryo implantation is not stable, so many factors can cause miscarriage. When miscarriage occurs, the embryo and the uterine wall will separate to varying degrees. Once the blood vessels at the separation surface rupture, vaginal bleeding symptoms will occur. According to a medical research, more than 50% of pregnant women can survive the early bleeding and continue their pregnancy successfully; about 30% of pregnant women may experience miscarriage.

In addition, nearly 10% of pregnant women may have ectopic pregnancies or other problems. Some pregnant women worry that if they have abnormal vaginal bleeding in early pregnancy, the baby will be unhealthy after they successfully preserve the fetus. Many studies have shown that more than half of miscarriages are caused by abnormalities in the embryo itself. This is a kind of natural selection. If the pregnancy can continue, the fetus is generally normal.

2. Cervical polyps, cervical erosion or cervical lesions

Affected population: those with complicated sexual life, poor hygiene habits, irregular lifestyle, poor body resistance, etc.

When it comes to early pregnancy bleeding, many people tend to ignore the problem of cervix. If the cervix is ​​severely inflamed and eroded, or if there are already cervical polyps, it is easy for the surface capillaries to rupture and bleed due to hormonal changes after pregnancy. In recent years, the age group in which cervical cancer most commonly occurs has quietly dropped to 30-40 years old. Being pregnant does not mean that there is no problem with the cervix. Cervical smear tests should be done regularly before and after pregnancy. If there is vaginal bleeding in early pregnancy, the cervix should also be checked for problems.

Three: Ectopic pregnancy

Population at risk: Those who have a history of pelvic inflammation, pelvic adhesions, or have undergone fallopian tube surgery, or had an ectopic pregnancy in the previous pregnancy, etc.

When the fertilized egg implants outside the uterus, it is called an ectopic pregnancy. The incidence rate is about 1%, and 95% of ectopic pregnancies occur in the fallopian tube. Because the wall of the fallopian tube is very thin, it cannot provide enough nutrition to the embryo. The gradually developing fertilized egg causes the wall of the fallopian tube to expand, which can cause the wall to rupture. Abnormal vaginal bleeding will occur at 7 to 8 weeks of pregnancy, and there may even be severe abdominal pain or shock due to massive intra-abdominal bleeding.