Low Carb (Jason Hernandez) posted reviews on his Constant Bleeder website about a couple of movies like that…

https://theconstantbleeder.com/bmoviescult/street-corner-1948/
https://theconstantbleeder.com/bmoviescult/because-of-eve-1948/

“The “baby” segment is, of course, centered on fluid-splattered, vagina-ripping birth footage, with shots focused so close on the woman’s stretching snatch that the emerging newborn looks like it’s gonna reach up and wipe a rainbow of afterbirth slime on the camera lens.”