Whether it’s infertility, to save a career or pure altruism, is there ever a reason that can morally justify surrogacy?

An online row last week underlines something we all know but which many prefer to ignore. There is something not right about surrogacy. The furore started with an Instagram post by Lily Collins: a picture of her new daughter, Tove, in a little basket, under which the Emily in Paris actor expressed “endless gratitude for our incredible surrogate”. Reaction split along predictable lines – those in favour of surrogacy, and those against.

What was striking was that it also split along another fissure: Collins’s possible motives. It was OK, some felt, to use a surrogate if you have infertility problems. But not in order to keep your figure, help your career, or because pregnancy is taxing and you are rich enough to outsource it.