Embryo

In this sci-fi thriller, Rock Hudson plays insular scientist Paul Holliston, who discovers a way to hasten the human growth process, allowing embryos to mature to adulthood in scant days. Holliston gets more than he bargained for, however, when he tests his formula on the fetus of a suicidal teen mother and his experiment turns into a murderous psychopath (portrayed by Barbara Carrera) who’ll do anything to stop her rapid aging.