The technician will measure the size of your gestational sac and also take a crown-to-rump measurement of the embryo, if its visible. At 7 weeks, your baby should be about 5 to 9 millimeters (mm) in size and the gestational sac will be about 18 to 24 mm.The technician will measure the size of your gestational sac

What can you see on a scan at 7 weeks pregnant?

A strong fetal heartbeat can be clearly seen at 7 weeks. The range can be from 100 to 180 beats per minute (bpm) . Any earlier than 7 weeks, you may not see the embryo or fetal heart beating due to the embryo being so small. A gestational sac and yolk sac may only be visible.

How likely is a miscarriage after seeing a heartbeat?

If you are pregnant, have no vaginal bleeding, and are without other risk factors (such as being older, smoking, drinking, or having an infection), most estimates suggest that your odds of having a miscarriage after seeing a fetal heartbeat are about 4%. Risk of miscarriage after seeing heartbeat: Overall risk: 4%