Tthere are physical examines that could show/prove whether or not the hymen is intact... however, if it's been ruptured, it wouldn't necessarily reveal how it got ruptured as a ruptured/torn hymen could have been caused by activities other than sexual intercourse such as horseback riding or bicycling; the use of a tampon or penetration of an object other than a penis.
So, the only sure way to know would be as jefelex and sweety suggested ...and that would be to discuss the topic with your wife. Maybe, she'd be interested in your state of virginity as well.
It is hard even if a doctor does examine her, because the hymen can break during normal everyday activities not just from sex. So like jefelex says trust her. If she says she is a virgin then you should trust her.
How about trust her when she says she is?
Hi there...seems like there is no physicians around..have her examined by women doctor !! or midwife
best ,
cyrus