Twins are no different than any pregnancy. After 16 weeks
at 7:13 PM on May. 22, 2009
no diffrence in times-17-20 weeks, I'd say for twins though prolly around week 17 because the longer you wait the less room they have so you might not get a great pic.
My son was all alone in there and he didnt want to roll over and show us the money shot LOL I can only amagin it being harder for twins to BOTH spread em and show you what they got