Why not advise the man in the partnership "remember that the risks to your partner and your potential child increase as she gets older, so get on with it"?
I don't know, I'm kind of conflicted about this.
I think most men know perfectly well that women aren't fertile forever.
But they don't care very much, because they know they have other options if her time should run out.
So to me that advice sounds more like "Men: the woman you are with is running out of time, but don't sweat it because there will be a younger model around and willing whenever you decide to get around to it."
Which, let's be honest, is advice that many men are already very well familiar with.
I'm not sure there is one piece of advice on this that works for both men and women and I think it's fine for women to receive messages about their own fertility. As long as that advice isn't about scaring them or restricting their options.
I think if women were advised to go it alone if they got to, say, 35 and nobody was willing to get them up the duff that men would find themselves a lot less reticent about agreeing to TTC.