Twins 32 weeks amniotic fluid broke preterm labor for twin preterm labor, defined as a twin pregnancy delivered at 28 weeks of gestation less than 37 weeks. Twin pregnancies are prone to preterm labor, with an incidence of up to 60%, and its etiology is multifactorial, such as high uterine cavity pressure, large placental area, and genetics.
1. High pressure in the uterine cavity: the volume of the uterine cavity in a twin pregnancy is larger than that of a single fetus, and the pressure in the uterine cavity is also large, and the dilation of the myometrial cells and the increase in stress will lead to an increase in the synthesis of prostaglandins and uterotonin, which will induce uterine contractions or premature rupture of the membranes, and thus premature labor of the twin pregnancy will occur.
2. large placental area: the placenta has the role of secretion of adrenocorticotropic hormone-releasing hormone (ARH), and in the case of twin fetuses, the placenta has a large area and secretes a lot of ARH, which, together with an increase in surface-active protein A secreted by fetal lungs, stimulates the uterus to contract, leading to preterm delivery of twin fetuses.
3. Heredity: There is a strong genetic correlation between preterm twin birth and heredity. Genetic variants such as early B-cell factor, eukaryotic selenocysteine tRNA-specific elongation factor, and angiotensin II receptor can lead to preterm twin birth.
There is no need to worry excessively about twins whose water broke at 32 weeks.