Master 40-Week Trimester Guide
July 22, 2026 | Updated: September 15, 2026Home / Pregnancy Hub / Trimester Guide Master 40-Week Trimester Guide A bird’s-eye architectural view of gestational timelines, developmental milestones, and prenatal care schedules. Overview of the 3 Trimesters A full-term human pregnancy spans approximately 40 weeks (280 days), structured into three distinct physiological windows: 1. First Trimester (Weeks 1-12) Focuses on embryo implantation, neural …