These days there are sophisticated and scientific solutions to the dismal problem of unwanted childlessness — there are IVF, Viagra and well-established egg and sperm donor services. We think of these as recent advantages and give thanks for the modern age.

But what only very few people are aware of is that long before sperm donation was practically or ethically possible, in the early 20th century, a secret sperm donation service existed for those women most in need.