I'm not aware of anything in those products that would increase the risk of birth defects. Most things you use topically are absorbed far less into the mother's bloodstream than products taken orally or injected. So the amount of a topically applied product that gets to the fetus would be minimal.
If you choose to use one of these products, try to minimize your exposure by using it in a well-ventilated area and limiting the amount of time it stays on your skin.
As long as you use it as directed, it shouldn't be a problem. It's a topical solution that's not absorbed into your bloodstream, so it can't have any effect on the baby.