Patient's question:
NoDoctor's answer:
Generally, 3-4 check-ups are recommended during pregnancy. The first check-up is scheduled at 18-20 weeks of pregnancy. At this stage, it can be determined whether it is a single or multiple pregnancy, and the fetal head circumference can be measured. Because the error in multiple ultrasound indicators at this stage is relatively small, it is convenient to verify the gestational age. The second check-up is arranged at 28-30 weeks of pregnancy. The purpose of the ultrasound at this time is to understand the fetal development, check for any external deformities, and further assess the fetal position and amniotic fluid volume. The last check-up is performed at 37-40 weeks of pregnancy. The purpose of the ultrasound at this stage is to determine the fetal position, size, placental maturity, and whether there are any complications such as the umbilical cord, for the final pre-labor evaluation.