[Aromasin]

According to the article, her medical records said never been given painkillers (although it could well be she's never asked for painkillers, which I suppose is a different thing all together.)

In the UK at least, most women only use Entonox (a mixture of oxygen and nitrous oxide) for pain relief, and painkillers are only administered during lengthy pregnancy's. I wouldn't be surprised if the doctors/midwives were a little baffled, but just figured she was a hard nut.