What is the reason for excessive amniotic fluid in late pregnancy?

What is the reason for excessive amniotic fluid in late pregnancy?

The importance of amniotic fluid to the fetus is well known. However, the situation of each pregnant woman is different, and the amount of amniotic fluid is also different. If there is too little amniotic fluid in the late pregnancy, it is easy to cause malnutrition or hypoxia and suffocation of the fetus. On the contrary, the hidden dangers of too much amniotic fluid cannot be ignored. So what is the reason for more amniotic fluid in the late pregnancy?

1. Fetal malformation Among pregnant women with polyhydramnios, about 20% to 50% have fetal malformations, among which central nervous system and upper gastrointestinal tract malformations are the most common. In fetuses with anencephaly, encephalocele and spina bifida, the meninges are exposed, the choroidal tissue proliferates, and the exudate increases, leading to polyhydramnios. Infants with anencephaly and severe hydrocephalus lack central swallowing function, swallowing reflex and antidiuretic hormone, which leads to increased urine volume and polyhydramnios. In cases of esophageal or small intestinal atresia and pulmonary hypoplasia, the inability to swallow and inhale amniotic fluid can lead to polyhydramnios due to accumulation of amniotic fluid.

2. Multiple pregnancy The incidence of polyhydramnios in multiple pregnancy is 10 times that of single pregnancy, especially in monozygotic twins, and often occurs in one of the fetuses with a larger weight. This is because the blood circulation between the monozygotic twins is mutually communicated, and the dominant fetus has more circulating blood and increased urine volume, resulting in polyhydramnios.

3. Various diseases of pregnant women and fetuses such as diabetes, ABO or Rh blood type incompatibility, severe fetal edema, pregnancy-induced hypertension, acute hepatitis, and severe anemia in pregnant women. The blood sugar level of the fetus of a diabetic pregnant woman will also increase, causing polyuria and being discharged into the amniotic fluid. When the blood types of mother and fetus are incompatible, the placenta is heavier. It has been reported that when the placenta weight exceeds 800g, 40% of them are combined with polyhydramnios, and the pathological basis is chorionic edema affecting fluid exchange.

4. Placental and umbilical cord lesions Placental chorioangioma and umbilical cord velamentous adhesion can sometimes cause polyhydramnios.

5. Idiopathic polyhydramnios accounts for about 30%, without any abnormalities of the pregnant woman, fetus or placenta, and its cause is unknown.

From the above introduction, everyone is very clear about the reasons for excessive amniotic fluid in the late pregnancy. If the phenomenon of excessive amniotic fluid occurs, you must consult a doctor. Of course, during the prenatal check-up, if the problem of excessive amniotic fluid is found, the doctors will take corresponding measures to deal with it according to the specific situation of the pregnant woman and the fetus.

<<:  How can I relieve rough and sagging skin?

>>:  What are the methods to expel fetal toxins in late pregnancy?

Recommend

What is bleeding in the stool after childbirth?

Postpartum bleeding in the stool is most likely c...

Can women take motherwort granules for a long time?

Motherwort granules are an important medicine for...

When will milk dates be available? Do milk dates have a high sugar content?

Milk dates are rich in nutrients and are a rare d...

What is the reason for the odor after menstruation?

Some people will have a little menstrual period a...

How to distinguish between menopause and pregnancy

Many women have trouble differentiating between m...

Pregnant women dream that their teeth are loose

What does it mean to dream of a tooth pine being ...

Benefits of squats for the uterus

Practicing squats can enhance sexual ability to a...

Soleus muscle training method for girls

Girls also need to exercise in their daily life, ...

Can pregnant women bear being hungry before going to bed?

Anyone who has given birth to a baby knows that d...

Biparietal diameter at 16 weeks of pregnancy to determine the gender

At 16 weeks of pregnancy, it is already the fourt...

Can I have an abortion at 3 months of pregnancy?

Many women do not know they are pregnant until th...

What is the difference between uterine fibroids and uterine polyps?

Although uterine fibroids and uterine polyps soun...

How do indoor ants come into being? How to eliminate ants on the bed

Ants are a type of insect with many species, with...