Starting around 20 weeks, your health care provider will begin to measure your pregnant belly size from your pubic bone to the top of your uterus (aka the fundus) as part of routine prenatal checkups.

Background: Conventionally, the pregnancy duration is accepted to be 280-282 days. Fetuses determined by ultrasound biometry to be small in early pregnancy, have an increased risk of premature birth.

Fundal height helps track your baby's growth during pregnancy.\ Your belly size can show how your pregnancy is progressing. If your belly size differs from expectations, healthcare providers will ...