Pregnancy is divided into three trimesters, each marked by distinct phase of fetal development and maternal adaptation and physiological changes in the mother
Gestational Age Categories: Definitions and Clinical Significance
Pregnancy is often described based on the number of completed weeks of gestation.
Pregnancy outcomes and clinical management strategies depend heavily on the gestational age at delivery.
Each trimester and gestational age classification is important for decision-making regarding prenatal care, monitoring, and potential interventions. Preterm and post-term pregnancies are associated with higher risks and often require specialized evaluation and management to ensure favorable outcomes
References:
• Dutta DC. Textbook of Obstetrics. 9th ed. New Delhi: Jaypee Brothers Medical Publishers; 2023. p. 3
• Padubidri VG, Daftary SN. Shaw’s Textbook of Gynaecology. 18th ed. New Delhi: Elsevier; 2022. p. 5.
• Park K. Park’s Textbook of Preventive and Social Medicine. 28th ed. Jabalpur: Bhanot Publishers; 2025. p. 463.
• Babu SA. Clinical Obstetrics and Gynecology. 2nd ed. New Delhi: Wolters Kluwer India Pvt Ltd; 2025.