Many expectant mothers may not be very familiar with the name 'expired pregnancy'. Let me explain first that expired pregnancy refers to a pregnancy that exceeds the due date, which is more than 42 weeks. This is a high-risk situation that poses a threat to the health and safety of both the pregnant woman and the fetus. So, how many days should an expired pregnancy not exceed? Let the editor explain it to everyone.
How many days should expired pregnancy not exceed?
Reaching or exceeding 42 weeks is defined as an expired pregnancy, and the perinatal mortality rate at 43 weeks of pregnancy is three times higher than normal. At 44 weeks, it is 5 times normal. Primiparous women with expired pregnancies have an increased risk of developing fetuses compared to multiparous women. The hazards to the fetus and mother include fetal distress, reduced amniotic fluid volume, difficulty in delivery, and injury. So when a pregnant mother is 42 weeks old, she needs to go to the hospital for induction of labor or even cesarean section.
The Four Major Causes of Expired Pregnancy:
1. Genetic factors
If a family member has a history of this disease, or if the expectant mother has experienced this condition before, the likelihood of an expired pregnancy during pregnancy will be greatly increased. In addition, recessive genetic diseases such as placental sulfatase deficiency can also lead to expired pregnancies.
2. Fetal malformation
Fetal malformation may lead to insufficient hormone secretion, resulting in an expired pregnancy. If there is an anencephaly, the absence of pituitary gland can reduce estrogen secretion, ultimately leading to an expired pregnancy.
3. Imbalance of estrogen and progesterone ratio
During normal pregnancy and full-term delivery, estrogen levels increase and progesterone levels decrease. If estrogen cannot be significantly increased, it can lead to an increase in the proportion of progesterone, inhibit the effects of prostaglandins and oxytocin, and thus trigger an expired pregnancy.
4. Reduced uterine contraction stimulation reflex
Some expired pregnancies have larger fetuses, which can lead to imbalanced head and pelvis or incorrect fetal position. The exposed part of the fetus cannot be in close contact with the lower segment of the uterus and cervix, resulting in reduced reflex uterine contractions and leading to expired pregnancies.
The above is some information about expired pregnancy. When the pregnant mother exceeds 40 weeks, she should start paying attention and regularly go to the hospital for doctor's examination. If possible, she can directly wait for delivery in the hospital.
