Typically, obstetric ultrasounds are performed at various stages of pregnancy:
First Trimester (up to 13 weeks): To confirm pregnancy, determine gestational age, and check for multiple pregnancies. Second Trimester (14 to 26 weeks): To evaluate fetal anatomy, screen for congenital anomalies, and monitor fetal growth. Third Trimester (27 weeks to delivery): To assess fetal growth, position, amniotic fluid levels, and placental location.
