Apart from an strong instinctual drive to love and care for children there's no "knowledge" about how to do that. Studies have shown that mother's brains light up differently in response to cries from her own child, and there's a strong anxiety when it's crying, pleasure when it's happy, etc. (Interestingly enough, I couldn't find any studies done on men, but I don't see any reason that fathers shouldn't react similarly)

But there's no "this is how you rock babies," "this is how you breastfeed," etc. I don't see how that would even work. Genes aren't magical. And I've seen some really clueless mothers...