Serena drawing strength from childbirth scares

Serena Williams has revealed that she dealt with a series of medical scares after the birth of her daughter - and that the experience has made her stronger.

In a story in the February issue of Vogue and posted on the magazine's website on Wednesday, Williams discusses developing several small blood clots in her lungs while in the hospital after Alexis Olympia Ohanian Jr. was born in September.

According to the article, the tennis superstar "spent the first six weeks of motherhood unable to get out of bed".