This article from auntie Beeb does just have such a headline "Why is IVF so popular in Denmark" and then goes on to discuss all the effects of a *need* for and changes to regulation of IVF without once mentioning the reason.
Danish men make the least viable sperm of all nation groupings in the world.
I remember going to a conference at the Rigshospitalet in Copenhagen in 1998, where this was discussed by Dr Anna-Maria Andersson and Prof Niels Skakkabaek. They had a large collection of historical samples (I forget the exact details - it's >20 years ago) where various reproductive regulatory hormone levels could be demonstrated to be at reducing levels over time within given age groups of men. There was work going on to find causality, but I don't recall conclusions being available at the time, though environmental oestrogens were one suggestion. It's a slightly scary problem, and one the Danes seem to have dealt with in their own way.
This listing of papers by Prof Skakkabaek is interesting.
But regardless, social agenda much? BBC, you are increasingly disappointing.