How long into pregnancy can an ultrasound detect a fetal pole?

Patient's question:

No

Doctor's answer:

Development of the embryo, 30--40 days forms the gestational sac, 40--50 days forms the embryo, 50--60 days forms the fetal heart. Therefore, routine ultrasound examinations are usually performed around 60 days, when the gestational sac, embryo, and fetal heart can be observed to determine if they are normal.