From the drowned out skin overlay, I've separated the pregnant belly mask as standalone overlay to allow you to pair it with other skin default mods and overlays. Comes for both female and males. The overlay also comes in the same innie/outtie variants as it does on the original Drowned Out Skin overlay.
Xld_Sims: Pregnant Belly Overlay (Drowned Out Skin) 2017-01-18
A separate pregnant belly overlay usable with any skin mod!