You may have had a positive pregnancy test but when will you be able to have an ultrasound to confirm the pregnancy?
The first part of the pregnancy that can be seen is the gestational sac. The gestational sac can be seen around cycle days 32-35, which is about 18-21 days after ovulation/fertilization. However, sometimes it can take a couple of days longer to see the gestational sac on transvaginal ultrasound. On abdominal ultrasound, the sac can be seen several days later.
The gestational sac is a structure that surrounds the embryo and can be seen even before the embryo is visible. About 7-10 days later, the embryo can be seen on transvaginal ultrasound (at approximately 6 weeks, 3 days). You can likely now also see the fetal heartbeat.
Usually, you cannot see the pregnancy on a transvaginal ultrasound until a blood hCG level reaches at least 1,500.