Is it possible to fall pregnant without having had sex before via artificial insemination?

Pregnancy with AI: I assume your question refers to the recommendation to have sex the day before your appointment for ai. This is generally to give you an extra chance to conceive, in case you ovulate prior to the usual window after an HCG shot. In short, yes, you can still conceive with ai alone. In case you are concerned about never having had sex and trying ai, the answer is the same.