Placenta previa is a common cause of uterine endometrial lesions in expectant mothers. Such as puerperal infection, multiple births, frequent curettage and caesarean section. , but also can cause endometritis or endometrial damage, so that the growth and development of endometrial capillaries is incomplete. When the embryo is implanted, the supply of blood night is insufficient, and the total area of placenta is enlarged due to the intake of sufficient nutrition, extending below the uterus.
The total area of placenta is too large. If the expectant mother is pregnant with twins, the total area of the placenta is larger than that of a single child and reaches below the uterus. The incidence of placenta previa in twins is twice as high as that in singletons.
Embryonic germ cells grow slowly. When the sperm and egg combine and reach the uterine cavity, they do not grow to the embryo implantation stage and move down to the uterus again, and at this time they grow and develop to produce placenta previa.
The harm of placenta previa to mother-postpartum hemorrhage and feeling. Because the placenta is attached to the bottom of the uterus, it is thin and brittle. During the second trimester and delivery, the bottom of the uterus is elongated, but the placenta cannot be elongated at the same time, which makes the outside of the placenta separate from the uterus and causes bleeding. Coupled with constant bleeding, expectant mothers often have high complications of severe anemia, poor physical resistance, and are prone to postpartum infection.
The influence of placenta previa on pregnant women-premature infants and ventricular placenta previa cause persistent bleeding, which is easy to cause premature infants; Partial exfoliation and stress of placenta previa can make placenta ischemic and hypoxic. It is easy to cause intrauterine rest of the baby; Because the placenta occupies the lower part of the uterus, it prevents the fetal head from entering the pelvic passage of the parturient, which makes the incidence of abnormal fetal position such as malposition and transverse fetal position higher than that of ordinary pregnant women.
Can placenta previa be delivered vaginally? Generally speaking, if the expectant mother has placenta previa, the doctor will take effective measures to operate bleeding, correct anemia and prevent infection. Whether vaginal delivery is possible or not is decided by the pregnant woman doctor according to the specific situation of the parturient. Doctors will decide how pregnant women give birth according to the actual situation of expectant mothers and fetuses. Expectant mothers don't have to be nervous, anxious or worried. Just consult a doctor.