Patient's question:
Please ask if the fetus develops arms first or legs first?Is the femur the thigh bone?
Can a 3.5-month fetus's ultrasound detect whether it is deformed!?
Doctor's answer:
Most fetal abnormalities can be ruled out, of course not 100%, as abnormal screening is highly related to the gestational age, position, and amniotic fluid of the fetus (for example, the fetus is often clenched in the uterus, so it is impossible to count the fingers and toes clearly). The best time for systematic fetal abnormal screening is between 18-26 weeks. 3D or 4D color Doppler ultrasound can be used for clearer visualization.