Yes, in most cases, it is possible to see the embryo inside the gestational sac on an ultrasound scan with 6 weeks of pregnancy, both naturally and by in vitro fertilization (IVF). However, on some occasions, the gestational sac is observed without an embryo, which may indicate two things: the embryo is still very small and cannot be seen or, on the other hand, it is an anembryonic pregnancy.
In case of doubt, it will be necessary to repeat the ultrasound after one or two weeks, at which time it is possible to confirm that there is a heartbeat and that the pregnancy is evolutionary. If, unfortunately, the gestational sac was empty and it was an embryonic pregnancy, it would be necessary to perform a curettage if the gestational sac was not expelled with spontaneous bleeding.
Suggested for you: The Sixth Week of Pregnancy.