This is common and has everything to do with your human chorionic gonadotropin (hCG) levels. Something as simple as getting the dates wrong may be the reason why you don’t see anything during a 5-week ultrasound. You may have counted the days incorrectly if you’re unable to see the gestational sac. There are a few possibilities as to why the gestational sac doesn’t show up during a 5-week ultrasound. Some women may go in for a 5-week ultrasound only to hear that their gestational sac isn’t showing up yet. What if nothing shows up on the ultrasound? It’s more common to see the heartbeat at 6 weeks or even later. You may get to see the flicker of a little heartbeat, but again, don’t stress if the sonographer can’t see it yet. The gestational sac increases in diameter by 1.13 mm per day and initially measures 2 to 3 mm in diameter, according to the National Center for Biotechnology Information. You may see the gestational sac in an ultrasound as early as 4 1/2 to 5 weeks. The gestational sac contains amniotic fluid and surrounds the embryo. The yolk sac is surrounded by a larger black area, known as the gestational sac. The yolk sac nourishes the embryo and also helps produce blood cells during the early stages of pregnancy. Surrounding the embryo is the yolk sac, which will look like a small white circle. It’s possible that the sonographer might be able to point out the embryo, which at this stage is likely a tiny white curled object. Don’t be worried if you can’t see your baby! The embryo is only the size of a peppercorn right now - about 2 millimeters (mm).Īt this stage, the only things you’ll likely see are the yolk sac and the gestational sac.

Sonogram pic