According to Osho, for women the natural point of sexual transcendence is around forty-two, the same as men, provided her sexuality has been lived freely, lovingly, and without repression since maturity. When fully lived, menstruation and sexual desire naturally fade then; if sex has been suppressed or not total, transcendence is delayed. Orgasm is the first step toward samadhi; live it consciously, then go beyond.
Yes, about age 42 if she has loved and lived her sexuality openly; if it's been suppressed, it takes longer.