Curious about a friend

Breean • Mama to Delilah Mae Dexter Kash and Declan Grey 💖
So I have a friend that is pregnant and this is probably stupid lol I thought when they did an ultrasound of twins in the picture it always showed both sacks and baby's. Not the babies at separate times ? She's only 7 weeks 5 days . Is it the way they did the ultrasound or did they just give her images of both babies at different  times I'm just being nosy really lol .