Well, a few questions then. What types of contraception were even available in 1930? The oldest forms of birth control included coitus interruptus, pessaries, and the ingestion of herbs that were believed to be contraceptive or abortifacient. The earliest record of birth control use is an ancient Egyptian set of instructions on creating a contraceptive pessary. Condoms in some form or another are probably the oldest form of "barrier methods" but coitus interruptus goes back to ancient Biblical times.
It wasn't until the 18 th. century that the link was made biologically between the sperm and the fertile ovum causing fertilization. Once this was discovered, various methods were devised to prevent this from happening or if it did occur, to prevent implantation and normal gestation. Birth control in some form or another has been around for thousands of years. Seeing babies as consequences for illicit sexual pleasure is hardly a new concept.
Certainly, and for two thousand years, Christianity has universally taught that it is immoral, without exception until 1930.