I am not qualified to render an opinion on this subject:

The idea that birth can be orgasmic isn’t new. The British birth guru Sheila Kitzinger says that she has met “hundreds” of women during the course of her career who report experiencing orgasm during labour – some were hoping for it, others were taken completely by surprise. She herself has experienced it during three of her four labours (she has five daughters: one birth was twins). “It is difficult for a man to understand,” she says “hard, too, for any woman who has had an average hospital birth. But it can be one of the most profound psychosexual experiences in a woman’s life. Each contraction may bring a rush of joy so overwhelming that the pain recedes into the background.” She puts this partly down to simple biology. “The pressure of the baby’s head against the walls of the vagina and the fanning out of the tissues as the head descends bring for some women an unexpected sensation of sexual arousal, even of ecstasy.” But is this really an orgasm? Or just a very unusual sensation? “It can be orgasmic. People recognise it as an orgasm. And it can be a multiple orgasm, one with each push.”

Well, there can be a fine line between pain and pleasure, particularly when it comes to this sort of pain and pleasure.