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Gestation refers to the period of time during which a developing fetus grows inside the uterus of a pregnant female. In humans, gestation typically lasts approximately 40 weeks, measured from the first day of the woman’s last menstrual period (LMP) to the birth of the baby.
Gestation is divided into three trimesters:
1. First trimester: Week 1-12 (approximately 3 months)
– The fetus develops major organs and body systems.
2. Second trimester: Week 13-26 (approximately 3-6 months)
– The fetus grows and develops rapidly, and the mother starts to feel movements.
3. Third trimester: Week 27-40 (approximately 6-9 months)
– The fetus continues to grow and prepare for birth.
Gestation is a complex process that involves:
1. Embryogenesis (week 1-8): The fertilized egg develops into an embryo.
2. Fetal development (week 9-38): The embryo grows into a fetus.
3. Maternal adaptations: The mother’s body undergoes changes to support the growing fetus.
Understanding gestation is crucial for monitoring pregnancy progress, identifying potential complications, and providing appropriate prenatal care.