Can we disable the aliens abductions and pregnancies in gameplay?

You must be doing the actives in-game to trigger and up the percentage for alien abdution. Using the telescopes and working in the Scientist Career are main things that up the percentage chance of alien abductions. There is a satellite dish that can help prevent it, you can get it in build mode by the bb.ignoregameplayunlocksentitlement cheat. It is part of the GET TO WORK EP, to help you narrow down the pack. There is a already a setting option on the satellite dish to help "prevent" abductions.