Article here. Excerpt:

"It has always been the way that the only reward expected by women from the trials of childbirth has been the gift of life, in the form of a new baby. But American mothers are increasingly demanding more material compensation for pregnancy and labour: diamonds, other jewellery, or an expensive holiday.
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Spurred by the examples of Hollywood stars such as Pierce Brosnan and Ben Affleck, and encouraged by a growing range of gifts designed especially for such occasions, the motherhood industry has given birth to the concept of "push presents" - so-called both because they are a reward for the act of giving birth, and because mothers are pushing their husbands to dig deep into their wallets.

Fathers now not only have to make it to the delivery room on time, but had better come brandishing more than a bunch of flowers. A survey by the parenthood website BabyCenter.com found that almost four out of 10 new mothers received "push presents". An even larger number, 55 per cent, said that they expected them - so presumably some had been disappointed."