Cervical length in twins

If you are pregnant with twins, the length of your cervix will change. At this time, you should go for regular check-ups to avoid any abnormalities in the fetus in your belly. It is more important in the early stages of pregnancy, especially during the unstable period. You should have regular prenatal check-ups. This is the most intuitive way to check.

Symptoms: twin venous anastomosis, intrauterine fetal asphyxia, weight gain, physiological changes during pregnancy, frequent fetal movements, dyspnea, early pregnancy reaction, heavy varicose veins, swelling and edema

Clinical manifestations include severe early pregnancy reactions, uterine enlargement that is inconsistent with the month of pregnancy, excessive weight gain, frequent fetal movements, and an increased feeling of abdominal distension in late pregnancy due to excessive expansion of the uterus. At the same time, the elevated diaphragm compresses the heart and lungs, causing difficulty breathing. Due to obstructed venous return, severe edema and even varicose veins may occur in the lower limbs and perineum.

During abdominal examination after mid-pregnancy, the uterus enlarges beyond the corresponding month of pregnancy, and small limbs or more than two fetal poles can be felt in multiple places on the abdomen. Two fetal hearts can be heard using a Doppler and a stethoscope after 3 months and 5 months of pregnancy respectively.

1. Pregnancy

The blood volume of pregnant women with twins is greater than that of pregnant women with a single baby. Carrying two fetuses at the same time requires more protein, iron, folic acid, etc. In addition, the ability to absorb and utilize folic acid is reduced, so iron deficiency anemia and megaloblastic anemia often occur. Twin pregnancy is also prone to complications such as gestational hypertension, polyhydramnios, fetal malformations, placenta previa, placental abruption, postpartum hemorrhage, premature birth, dystocia, intrauterine growth retardation, intrauterine stillbirth, and abnormal fetal position.

The fetal position in twin pregnancy is mostly longitudinal, with head-on or head-buttocks being the most common, and other fetal positions are less common. In twin pregnancies, due to the enlarged uterus and high pressure, premature rupture of membranes and premature birth are more likely to occur. Identical twins have a lower average birth weight. In twin pregnancies, the placenta is large and sometimes extends to the lower uterine segment and the internal cervical os, forming placenta previa and leading to prenatal bleeding.

2. Delivery period

There are many abnormalities during twin delivery, the types of which are as follows:

(1) Prolonged labor is caused by uterine enlargement and excessive extension of muscle fibers, which can easily lead to primary uterine atony and prolonged labor. After the first fetus is delivered, the delivery of the second fetus may sometimes be delayed due to uterine atony.