In that case we should all be hermaphrodites since sperm and ovum have something to do with reproduction lolNaw. If it has something to do with reproduction, it makes more sense if both sexes experience it.
They've never explained exactly how it works, but Vulcans are probably ready to reproduce years after they appear physically adult. T'Pol in her mid 60s had not experienced pon farr. Spock was in his mid 30s, but may have had advanced development because he was part human. Pon farr may signal reproductive maturity.
According to Memory Beta Vulcan females can get pregnant from age 16, males have to wait till their first Ponn Farr to make a female pregnant then they can reproduce any time after that. Not that MA is canon or anything but that means the woman have to wait for the males to catch to get pregnant lol