Wait so what new girls were added with the ability to get pregnant?
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Arc has a peculiar way to word things I'm afraid. Often leads to confusion.
No, if any girls that didn't have pregnancy content and now did, then it would be a very detailed point in the changelog.
What this one meant is that a couple of sex scenes with the girls (that currently can get pregnant) wouldn't allow you to impregnate them.
Which was a bit weird that some would and some wouldn't, so that was fixed.