I'm a mom to twins.When I had the ultrasound at 12 weeks where we found out it was twins they moved my due date up to 36 weeks. That's considered full term for twins, but if you go longer yay you! They can't always determine if they are identical by ultrasound. If they are sharing a sac they are identical. Mine each had their own sac, but one placenta, so it could go either way (because two placentas can grow together). They offered me a dna test when the twins were born to determine for sure. It's pretty common to have a scheduled c-section. When I went to Lamaze class they had a guest speaker come in and she had wanted a natural birth, done 14 hours of labor had one baby vaginally then the second baby fell breech and they couldn't turn her, so she had to have the second one c-section. I had my doctor schedule my c-section that day. Also they wouldn't let me travel after 32 weeks at all. Planes were a big NO.