A growing number of women struggling to have a baby are going under the knife and getting weight-loss surgery to boost their fertility.

While some doctors are wary, one Manhattan surgeon says 15% of his female patients choose bariatric surgery because they're hoping to get pregnant.

"In Manhattan, the classic stereotype of women who are going for fertility treatment [is] Sarah Jessica Parker. That's not who I operate on," said Mitchell Roslin, chief of obesity surgery at Lenox Hill in Manhattan.

Jassira Espailat Batista had bariatric surgery at Lenox Hill in 2008 after eight years of failing to get pregnant.

"Doctors told me if I want to have kids one day, I have to lose weight," she said.

She lost 170 pounds and got pregnant twice. She delivered her son Liam in 2009, and her second child is due in December.