
Sims 4 added a new science baby feature that lets Simmers raise kids without having to get pregnant and give birth. Normally, these science babies show up on your doorstep once you complete the interaction. The Science Baby Tweak Mod lets you choose between instant delivery and causing a pregnancy. It’s a small adjustment, but it gives players the freedom to choose how they want to start their family.
Follow these steps to install Science Baby Tweak Mod on your Sims 4 game:
Download the mod file from the link above. Sims 4 mods typically come as .package or .ts4script files.
Open your Sims 4 Mods folder. The default location is: Documents/Electronic Arts/The Sims 4/Mods
Place the downloaded file directly into the Mods folder. You can organize mods into subfolders up to one level deep.
Launch The Sims 4 and go to Game Options > Other. Make sure "Enable Custom Content and Mods" is checked.
Restart the game if it was already running. The mod should now appear in your game.
Important: Always back up your save files before installing new mods. After Sims 4 updates, mods may need to be re-downloaded or updated by the creator.
Platform
The Sims 4 (PC/Mac)
Pro tip: If a mod stops working after a game update, check the creator's page for an updated version. Broken mods can cause the game to behave unexpectedly.
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Created by
Mod Science Baby 80018691
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Published
December 21, 2025
Source
MustHaveMods.com
Last Updated
August 9, 2026