Which ultrasound around 36 weeks assesses placenta location to determine previa risk?

• A. Fetal growth scan
• B. Nuchal translucency screening
• C. Placental location ultrasound
• D. Biophysical profile

Answer: (C)

The key idea is using ultrasound to map where the placenta sits late in pregnancy so you can assess placenta previa risk and plan delivery safely. At about 36 weeks, checking placental location helps determine if the placenta covers or is near the internal cervical os. If it is low-lying or previa, a cesarean delivery is often planned to prevent bleeding and complications. If the placenta is away from the os, vaginal delivery may still be possible.

Other scans have different purposes and don’t focus on placement relative to the cervix: a fetal growth scan looks at fetal size and amniotic fluid; a nuchal translucency screen is an early-p pregnancy test for chromosomal conditions; a biophysical profile evaluates fetal well-being, not placental position.