Preterm birth is one of the important causes of neonatal death, what are the causes of preterm birth

During pregnancy, there are ** diseases, diabetes, high blood pressure, these diseases can lead to premature birth in pregnant women.

If you do not do a good job of self-protection during pregnancy, you may have some infections, or induce some ** diseases, which may lead to premature birth.

It can cause digestive disorders, such as some premature babies who don't have a good digestion.

Premature babies are born prone to neonatal jaundice and neonatal gastroenteritis. After birth, it may lead to necrotizing enteritis, cerebral palsy, ischemic-hypoxic encephalopathy, and also predispose to eye diseases.

Premature babies are usually born with diseases such as neonatal jaundice, which need to be carried out by ultraviolet irradiation and other means**.

Answer]: B analysis: Preterm birth can be divided into spontaneous preterm birth (accounting for 45%, including lower genital tract infection), preterm premature rupture of membranes (lower genital tract infection), **sexual preterm birth (fetal malformation), so this question is selected b.

Error avoidance] Genetic factors are the main cause of early miscarriage**, not preterm birth**; Empty Deficiency A common occurrence of preterm birth** is a decrease in the level of pregnancy clearance hormone; cephalic and pelvic disproportionality leads to dystocia rather than preterm birth; Uterine malformations are a factor in preterm birth, not fetal malformations. Ayes.

1. The relationship between preterm birth and age: the preterm birth rate of pregnant women under the age of 20 or older than 35 years old has increased significantly, especially for those younger than 20 years old, and the incidence of preterm birth is 11 times that of the 20 and 34-year-old group.

2. The relationship between preterm birth and abortion history: the history of miscarriage, especially the history of late miscarriage, recurrent miscarriage, induced abortion, induced labor or re-pregnancy less than one year after abortion, has the greatest impact on pregnant women. Due to the varying degrees of damage to the cervix caused by abortion, cervical insufficiency is caused by inadequate cervical function, which increases the rate of preterm birth.

3. The relationship between fetal position and preterm birth: the incidence of preterm birth in breech presentation is 7 times that of the total maternal preterm birth rate.

4. The relationship between preterm birth and disease: pregnancy combined with acute infectious diseases and certain internal and surgical diseases, such as rubella, influenza, acute infectious hepatitis, acute pyelonephritis, acute cholecystitis, acute appendicitis, pregnancy-induced hypertension, heart disease, etc., can easily lead to preterm birth. Pregnant women with endocrine disorders, insufficient progesterone or estrogen, severe hyperthyroidism, diabetes, etc., can cause preterm birth.

Pregnant women with severe anemia can also be born prematurely due to insufficient oxygen supply to the uterus and placenta due to tissue hypoxia. Malnutrition in pregnant women, especially protein deficiencies and vitamin E and folic acid deficiencies, also contribute to preterm birth.

5. The relationship between preterm birth and living environment: engaging in manual labor, working too long and too tired can significantly increase the rate of preterm birth. Frequent mood swings or excessive mental tension can cause cerebral cortex dysfunction, increased catecholamine secretion, sympathetic nerve excitation and vasoconstriction, and premature birth.

Frequent sexual intercourse in the third trimester of pregnancy is a common cause of premature rupture of membranes. Smoking and excessive alcohol consumption in pregnant women are also strongly associated with preterm birth.

6. Twin or multiple pregnancy: due to the excessive extension of the uterus, it most often leads to early delivery, and the preterm birth rate is 10 to 15 times that of general pregnancy. Placenta previa and placental abruption are serious complications in the third trimester of pregnancy, which can cause bleeding inside and outside the uterus, premature termination of pregnancy, preterm birth, and can endanger the life of the pregnant woman.