The "Kate Effect" will once again drive retail sales in the United Kingdom. This time, not only for the Duchess' fashion picks but also for baby and related products as well.

According to the Centre for Retail Research (CRR), a 13% increase was forecasted for sales of prams and push chairs. Parents were expected to upgrade their baby's belongings to match those of the royal baby.

"The baby carriage will become a must-have status symbol and the lucky manufacturer can expect a similar boost in sales to that achieved by iCandy peach when Victoria Beckham adopted one for her daughter Harper," the CRR said.

In fact, the enthusiasm for the royal baby's birth already benefitted retailers of baby products. Mothercare saw a 2.14% rise in its shares Monday. This was due to an upgrade from "sell" to "hold" from the brokerage firm Panmure Gordon, citing "irrepressible momentum with respect to sporting and royal baby news".