I'm writing a kind of speculative novel about the virgin birth. However, at my MC's school, you are not allowed to stay if you happen to fall pregnant. But because these are "special circumstances" (godly miracle etc.), she is allowed to stay on. Providing she can prove that what she says is true. So she has to go a gynaecologist and get the verdict to keep her in school. However, how can they tell if you are a virgin, assuming that the act itself was, um, "gentle" (no bruising/scarring etc)? I understand that the hymen breaks, but is there anything else? If I could explain away a broken hymen with my MC's horse-riding, would I have to explain anything else away?

Sorry for the question. I hope nobody is offended by it. And thank you for any help you can offer!