Patient's question:
Hello! I am 26 weeks pregnant, and the S/D of the umbilical artery is 3.5. Is it high?Doctor's answer:
A certain proportion is slightly larger, but the increase is not significant. If the fetal development is normal, it can be temporarily monitored. It is recommended to undergo a BUS examination. Currently, it is important to rest and enhance nutrition. Calcium supplementation is necessary now, and sexual activity should be avoided in the last trimester.RI represents the resistance index, PI indicates the pulsatility index, and S/D is the impedance index of umbilical artery blood flow! The S/D value is not high and within the normal range! Before 30 weeks, S/D can be greater than 3 but less than 5! After 30 weeks, S/D should not exceed 3!