Alien Resurrection on PS1 has a pretty interesting facehugger mechanic in which you get facehugger and a xeno pops out of your chest if you don't radiate the chestburster away.

Warframe has a frame called Jade, who's a healer with a fertility/pregnancy motif.

Aside from that, games like Wolfenstein 2 or TLoU2 use pregnancy as themes and plot bits without any gameplay mechanics involving pregnancy.