You've just learned you're pregnant with twins! Odds are, you're in complete shock. You may be asking questions like, how did this happen? How common are twins? Are they identical or fraternal? And could it happen to me again? Today we're leaning all about "twinning", the process of conceiving twins.
After getting over the initial shock of being pregnant with twins, most soon-to-be parents want to know if their babies are identical or fraternal. How do medical care providers determine your twin type? What exactly are they looking for during those ultrasounds?