Hmm, that's an interesting question, if Vulcan women only can concieve during Pon Farr. I don't think we know enough to say for sure. In New Frontier, Selar concieved during Pon Farr, and there were scrapped plans for Saavik to concieve in STIII.
New Frontier had a small supporting character of Selar's gay brother who was said not to go thru Pon Farr. Vanguard has a lesbian Vulcan T'Prynn who did go thru Pon Farr.
From that we could assume that homosexual female Vulcans go thru Pon Farr, but males don't.