I remember I've seen one with impregnation at the end, but I lost it =/
I remeber pretty well that were 2 girls/heroines, which were a small, almost flat chested girl with a black-red suit (and she had shaved pussy) and a busty one with a blue-purple-ish suit (and she had hairy pussy). In the movie, they were captured by a guy -a masked one If i remember correctly- and scientists made lots of experiments, including one using a strange helmet and a cumming dildo (which uses fakecum) in the girls; later on the same movie, the little girl gets r***ing by a lots of guys, and a fat guy creampies her. It ends with some lesbian play with another girl (using a spear, if I remember well) and sex with the masked guy.
If someone knows which movie is this one, I'd love to know the name! Thanks in advance!