A good chunk of the movies he produced during the 80s dealt with mutant babies, babies conceived by mutants, babies conceived by aliens, genetically altered babies, or just plain evil babies. Most of those babies ripped their way out of their mothers.
I just got to wondering about that. He and Lucio Fulci should have made a movie together. It could have been about a mutant baby that rips out of its mother and gouges out people's eyes.
Roger Corman's just having a bit of splattery fun with the pregnancy concept,that's all,since the actual live birth of a baby is a bit of a gory experience(blood all over the baby,the removed womb sac,the birth woman's crotch stained with blood)to actually watch.
As for Corman and Fulci working together,it would have been really cool,and would have given Fulci as much national exposure as Corman did David Cronenberg(with releasing both "Rabid" and "The Brood"),but Maestro Fulci would have complained about not receiving his royalties from Corman(the typical fate of a domestically distributed genre film in the 70s and early 80s,where the distributor made more money,or all of it,than the film's producer did).
Plus, Roger was just cashing in on the trendy "ultimate horror" topic of the day. Alien's chest-burster and assorted reproductive-organ imagery, and the minor success of earlier stuff like It's Alive (1974) ensured that.
Rog was hardly alone there, everyone in Hollywood's B-Level was doing it.
I find it funny, since a lot of the old exploitation and sideshow-like films of the Thirties and Forties used childbirth footage. It's sort of like Corman was carrying on in the same tradition, though I doubt he realized it.