1/3
3 Years of Service
Pregnancy is usually like a bonus achievement. It's extra and not essential to most stories and more often than not ends up in the epilogue. The other extreme is crazy prego-fetish stuff that just makes it crazy pointless and pretty repulsive. I think Zargon's Young Again has done one of the best mid-game pregnancies where it's there if you want it while having plenty of story left to actually see what happens.