After doing the brothel and going the inn at Seliana  you and your companion do not get pregnant. I don't know if you already noticed or not.

Edit: Also resting there when pregnancy is fully developed you do not give birth, its probably the same in starting village. Why is that?

The part where sleeping in other places than Sylva City didn't trigger the birth scene is intentional, since we didn't plan to make the characters go into labor anywhere other than Sylva.