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Development of human fetal behavior: a review.
Fetal Diagnosis and Therapy
|January 1, 1990
Summary
Human fetal movements emerge early in gestation and show diurnal variations by 20 weeks. Fetal behavior becomes cyclical and state-dependent later in pregnancy, requiring extended recordings for accurate assessment.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
- Developmental Biology
Background:
- Fetal movements are crucial indicators of well-being.
- Understanding the developmental timeline of fetal behavior is essential for prenatal care.
Purpose of the Study:
- To describe the emergence and progression of human fetal movements and behavior throughout gestation.
- To identify patterns and variations in fetal activity.
Main Methods:
- Observational study of human fetal movements.
- Analysis of fetal behavior patterns at different gestational ages.
Main Results:
- Fetal movements appear before 16 weeks gestation.
- Diurnal variations in fetal behavior are evident from 20 weeks.
- Quiet intervals increase after 26 weeks, leading to cyclical behavior.
- Identifiable fetal behavioral states emerge around 36 weeks.
Conclusions:
- Human fetal behavior develops progressively throughout gestation.
- Fetal activity becomes cyclical and state-dependent in the third trimester.
- Prolonged recordings are necessary to interpret fetal activity accurately, especially in late gestation.