Is it just pure neem oil? I personally, wouldn't use it if it is concentrated oil because it is a bio-pesticide and that can cause reproductive harm.
Neem oil is great for eczema though but I would use something else for now if it is pure neem oil. Especially since it is known to prevent pregnancy.
|Packed with the antibacterial, antifungal, antiviral, antihistamine, antiseptic, spermicidal and immune-system stimulating components nimbin and nimbidin, neem is said to do everything from repelling insects to preventing pregnancy. India's neem tree is practically a first-aid kit in itself.
read the rest of the source here
Here's another link that mentions neem as an abortifacient