Implosion

Breeding machines and fertility camps. When a foreign power puts a sterility drug in Britain's reservoirs, the result is all too predictable. The birth-rate plummets and the country's future looks bleak. There is only one way to save the nation; all women with a natural immunity to the drug must be placed in special camps where they can be bred from like prize cattle. They must be given special hormone treatment and artificial insemination so that they can produce triplets, quads, quins time after time until they die of exhaustion.
They must become Nation Mums, the sole hope of a desperate people. They must be pampered and disciplined to accept their role. Even if one of them happens to be the wife of the Minister in charge of the whole terrifying affair...