Due to the insufficient amount of anterior waters in childbirth with oligohydramnios, a flat fetal bladder is formed, which is not able to perform its function (it contributes to the opening of the cervix) and leads to the development of weakness of the labor forces and prolonged labor.
Also, oligohydramnios can cause premature birth.
In the third stage of labor and in the early postpartum period, hypotonic bleeding may occur due to retention of membranes and parts of the placenta in the uterus. Oligohydramnios increases the risk of cervical rupture during childbirth (in 24% of cases).
The lack of amniotic fluid contributes to the development of fetoplacental insufficiency, intrauterine hypoxia and fetal hypotrophy.
Consequences for the fetus.
The lack of amniotic fluid provokes a delay in the growth and development of the fetus (the birth of underweight children with malnutrition) and intrauterine fetal hypoxia.
If there is severe oligohydramnios, it is possible to develop a curvature of the child's spine and hip joints (permanent trauma due to the small size of the uterus), the appearance of adhesions between the skin of the fetus and the fetal bladder, which, with further growth of the fetus, can lead to amputation of the limbs.
There is a high probability of late miscarriages, antenatal death of the fetus and death of the child in the first days after birth.