Had ours done at 32wks but baby wasn't playong along so we didn't get the best pictures. But still its very awesome to see chubby cheeks and a lil button nose!
Im 26w 4d, i was thinking about getting one done when i was around like 30 weeks.
My dr gives me 4d everytime I go. Once you are further along then the baby looks more human like and u can see some features but in the beginning it sure didn't look like much lol.