The reason of spontaneous abortion?

summary

At present, according to the actual situation in China, the abortion period is still set at 28 weeks ago. Clinically, abortion occurs at 12 weeks of pregnancy, the former is called early abortion; It occurs at 12 weeks, which is called late abortion. Spontaneous abortion is a common gynecological disease. If it is not handled in time, it may leave inflammation and damage of reproductive organs, or endanger the health of pregnant women due to massive bleeding, or even threaten their lives; In addition, spontaneous abortion is easy to be confused with some gynecological diseases, so we should pay attention to the identification. So what are the specific reasons for spontaneous abortion?

The reason of spontaneous abortion?

Some chronic reproductive tract infections are considered to be one of the causes of early abortion. The pathogen that can cause recurrent abortion is often persistent in the reproductive tract, and the mother rarely produces symptoms, and this pathogen can directly or indirectly lead to embryo death. Retrograde infection of reproductive tract usually occurs before 12 weeks of pregnancy. After this period, the placenta and decidua fuse to form a mechanical barrier. With the progress of pregnancy, the anti infectivity of amniotic fluid gradually increases, and the chance of infection decreases.

The abortion caused by immune factors, especially recurrent abortion and habitual abortion, can be divided into two types, namely autoimmune type and alloimmune type. Autoimmune type usually can detect various autoantibodies from patients, mainly antiphospholipid antibodies. Alloimmune patients were screened for common causes, so it is also called unexplained habitual abortion; These are mainly related to the poor physiological protective immune response during pregnancy, the lack of immunosuppressive factors or blocking factors, and eventually the embryo suffered from immune damage, leading to abortion.

Polycystic ovary: it has been found that the incidence of polycystic ovary in habitual abortion can be as high as 58%, and 56% of the patients have high LH secretion. It is suggested that high concentration of LH in polycystic ovary may lead to the premature completion of the second meiosis of oocytes, thus affecting the process of fertilization and implantation.

matters needing attention

Before pregnancy, go to the hospital for physical examination, especially those who have a history of abortion in the past, they should have a comprehensive examination. If they find some diseases, they should be treated first, and then get pregnant after the disease is cured. Some patients with uterine malformation can be operated to correct the deformity; Rubella virus, Toxoplasma gondii, herpes simplex infection, should be treated first, until the examination turned negative before pregnancy; If you have luteal insufficiency, hyperthyroidism, severe anemia, diabetes and other diseases, you should control the disease before you plan to get pregnant; Patients with cervical laceration should be treated with cervical canal repair; In order to prevent abortion, cervical cerclage should be performed at 14-16 weeks of pregnancy.