Searches on Internet for pregnancy products surge

The volume of Internet searches for products related to pregnancy preparation saw a dramatic increase after China announced its plan last week to allow all couples to have two children.

The search index for "preparing for pregnancy" increased in the past week by 148 percent year-on-year, according to Alibaba's Taobao and Tmall, China's two biggest online shopping platforms.

The index gauges popularity of products based on search volume, with average interest in a product assigned around 100 on the scale.