Since He is the one taking it, I don't think there is any contraindication to pregnancy.
I couldn't find any information about effects on the sperm count. The sperm themselves should be normal, so the embryo should also be normal (with ANY pregnancy there is of course a small risk of birth defects).
I assume that you have been vaccinated against Hep A and B, or are known to be immune. If you do have a baby, the baby should be vaccinated as soon as he/she is old enough too. (I think that is pretty standard in most states).
There shouldn't be any increased risk of birth defects since you are the one carrying the child.
I hope this is useful information!
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