Final answer:
Fundal height measurements are typically started around 20 weeks of pregnancy to estimate the gestational age of the fetus and assess its growth.
Step-by-step explanation:
In pregnancy, the measurement of the fundal height is used to estimate the gestational age of the fetus and assess its growth. Fundal height measurements are typically started around 20 weeks of pregnancy. At this stage, the uterus is large enough to be felt above the pubic bone. Measuring the fundal height involves using a tape measure to determine the distance from the top of the pubic bone to the top of the uterus.