You don't want the post birth gameplay ...
Happiness cannot drop below 12 anymore, which is great, but there are some downsides.
No regular eating anymore - food is capped at 8
No regular sleeping anymore - energy is capped at 5
Regularily getting puked and peed at - hygiene is capped at 2, showering will take 2 hours now
Daily payment of $500
No "being out" between 20:00 and 08:00
Mother's love towards you drops by 5 daily, plus one for every hour you do not spend caring for the baby.
All Kink points will reset to 0 and be capped at 1.
Luckily pregnancy will go on forever, even for years.