You are being paranoid, but in your defense a father-to-be is hard-wired that way. :) You may find this link clarifying: https://www.discoverneem.com/neem-oil-pregnancy.html Personally I am always far more worried by the exposure to lemongrass during pregnancy, as studies do suggest it causes birth defects. Re neem - protecting your pregnant wife from Dengue Fever & malaria is #1.