I thought the bit about babies was odd. I've certainly never had baby-related mail. I'm guessing that perhaps if you're expecting and start going to ante-natal classes and so on, your name might find it's way on to baby-related mailing lists... If you then lost the baby, you might want to be removed from said lists.

Baby-related mail is suddenly very easy to get once you're pregnant. Unlike other types of (junk) mail, it's very tempting to ask for all sorts of companies to mail you, because your shopping time goes down drastically (wandering the shops with an extra three stone attached to your stomach is, I promise you, deeply unpleasant) and you want to be able to compare prices and stuff at home.

For instance, I signed up for the Tesco baby club (free to join and provides special offers, etc.) and the Mothercare mailing list. Had I - as you suggest - joined one or more of the antenatal classes (instead of dropping sprogs at six months), I would have probably received even more (TAMBA and the others all tend to mean more mailing lists).

So pretty much every mother to be ends up with plenty of baby-related mail. Hence they're exactly the people who don't want it if something goes wrong.