00:00I think we can rule out twin-to-twin transfusion syndrome.
00:03I mean, these babies both have their own placentas and sacs,
00:05so they're unlikely sharing any blood supply.
00:07So what's causing the size difference?
00:10I'm not sure.
00:12Can you pull up Olivia's last ultrasound?
00:23Oh, my God.
00:25What is that?
00:28I see why they missed the second fetus on her prior ultrasound.
00:32It's not clearly visible yet, but...
00:36I don't think that the female fetus is growth-restricted.
00:39I think she's younger than the male fetus.
00:41You lost me.
00:42These are not twins.
00:43These babies are of different gestational ages,
00:46about four weeks apart, I'd estimate.
00:50How is that possible?
00:52I think that this is an extremely rare case of superfetation.
Comments