If you're specifically after pregnancy, and you're not focused on the Japanese art style (mentioned as your examples), you might take a look at Simple Days and The Hard Way. Both of these are sandbox (with hints, at least), have a 3DCG art style, and include pregnancy as part of their gameplay (and yes, pregnant sex with those you can impregnate).
LonaRPG has a pregnancy system, unlike VH you're not immediately told you're pregnant, instead there are symptoms and a pregnancy test. The pregnancy system also plays a part with getting reborn.