Why is the fetus more active at night?
Apr 23, 2023
Source: Cainiu Health
Dr. Lv Aiming
Introduction
Frequent fetal movements at night may be caused by physiological factors, or by pathological factors such as ischemia and fever. The specific analysis is as follows: Fetal movements can reflect the condition of the fetus within the uterus, and these movements are usually influenced by circadian rhythms—relatively uniform from 8 a.m. to 12 p.m., decreasing to the lowest level around 2 p.m., and then increasing again starting at 8 p.m.
Frequent fetal movements at night may be caused by physiological factors, or by pathological conditions such as ischemia and fever. The specific analysis is as follows:
1. Physiological Factors
Fetal movements reflect the condition of the fetus within the uterus. These movements are typically influenced by circadian rhythms—relatively consistent from 8 a.m. to 12 p.m., decreasing to the lowest level around 2 p.m., and then increasing again starting at 8 p.m. Therefore, increased fetal movement at night is considered normal and generally requires no intervention.
2. Pathological Factors
1) Ischemia: If a pregnant woman suffers from severe anemia or infectious diseases, her body's oxygen consumption may increase while blood oxygen levels decrease, leading to frequent fetal movements. Under a doctor's guidance, medications such as succinic acid ferrous tablets or folic acid tablets can be taken to improve anemia.
2) Fever:
An elevated maternal body temperature accelerates metabolism in both the mother and the fetus, which may result in increased fetal activity. Under medical supervision, antipyretic medications such as ibuprofen sustained-release capsules or acetaminophen tablets may be used to reduce fever.
In addition to the above, placental abruption can also cause frequent fetal movements at night. Pregnant women are advised to have regular check-ups at the hospital to monitor their own health and the condition of the fetus.
