I had one at 20 weeks, but then I had to go back at 28 to recheck her spine. She said they like to do it around 20 weeks because the baby is an easy size to see, but I'm sure they can do it later. I would just call and ask.
Jana, wife to Preston; Mother to Mason (5/23/08)
and Hunter (7/22/10)
WOHM (aerospace engineer). breastfeeding, cloth diapering and new to knitting
and dyeing, I also like to sew.