What Causes Reduced Fetal Movement Amplitude During Late Pregnancy?

Decreased Fetal Movement Amplitude in Late Pregnancy

The common reasons for decreased fetal movement amplitude during late pregnancy include fetal growth, decreased amniotic fluid, fetal presentation entering the pelvis, umbilical cord torsion, placental abruption, etc. It is essential to follow medical advice and undergo regular pregnancy check-ups on time. If any abnormalities are detected, prompt action should be taken.

1. Fetal Growth

During late pregnancy, the fetus grows rapidly, reducing its mobility within the uterine cavity. As a result, the amplitude of fetal movements becomes smaller. This is generally normal and pregnancy check-ups should continue as scheduled.

2. Decreased Amniotic Fluid

The volume of amniotic fluid typically decreases from the second to the third trimester of pregnancy, resulting in smaller fetal movement amplitude and reduced frequency of movements. This is generally considered normal and can be observed temporarily.

3. Fetal Presentation Entering the Pelvis

In late pregnancy, as the fetal presentation enters the pelvic inlet, the fetal position becomes relatively fixed, limiting fetal movements and thus reducing their amplitude. Adequate rest and continued pregnancy check-ups are recommended.

4. Umbilical Cord Torsion

Umbilical cord torsion occurring in late pregnancy can affect nutrient supply to the fetus, leading to decreased fetal movement amplitude and potentially altered fetal heart rate. Measures such as lateral recumbency and oxygen inhalation should be taken to prevent fetal distress.

5. Placental Abruption

Caused by factors such as trauma or hypertension, placental abruption impairs placental function and subsequently affects the fetus, resulting in significantly decreased fetal movement amplitude. This sometimes occurs in late pregnancy. Timely oxygen inhalation is crucial, and if fetal heart rate abnormalities are evident, cesarean section may be necessary. It is also important to consider the possibility of congenital fetal abnormalities or uterine malformations, all of which require prompt medical attention and management according to the doctor's advice.