First Contact

Ultrasound of twins at 6 weeks (not mine, fyi!)

Question of the week (for me) -- when do people have first contact with their children? I may have seen mine very early on, when I was only about 6 weeks pregnant. I saw two blobs on an ultrasound image, anyway. But was that them--Becky and Sam? 

One thing seems pretty clear--it's not until 20 weeks gestation (very roughly, and at the very least