Seeing not one but two embryos on your first ultrasound can bring up a lot of feelings: "This was very unexpected, and I’ll admit I am scared," says one BabyCenter mom with twins on the way. "I'm 4'10 ...

There are a couple of standard questions sonographers expect from parents at their first ultrasound: can you see a heartbeat and how many are there? Although having twins might be considered rare, ...

Cinematic-MRI shows twins vying for legroom in utero. Dec. 3, 2012— -- Sibling rivalry can apparently begin even before birth and researchers in London have remarkable footage of twins fighting ...