Do you have a Link? I want to look up there how exactly the Ovulation Inducer is working so I get more children at the same time for when I want to retire?
Is it even possible to end the game whith taking care of (all) the siblings?
Here's the link to the wiki:
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. Be aware it is in japanese, but your browser should auto-translate. The page that this goes to specifically is about the pregnancy chance and the number of children per pregnancy. As it stands, the only ending you can get only shows Hazumi taking care of a single child. I don't know if there are plans to change that or not though.
I also recommend checking out this forum:
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. This is where you can download the mod on the front page and see some discussion on different items. I highly recommend you download the mod as it fits in great with the game. I also just posted at the bottom some changes to the code that I made, which make getting different numbers of babies easier. Hope this helps!