CHICAGO -- Doctors say more and more patients are requesting a new birth control pill called Yasmin -- not just to prevent pregnancy, but weight gain, as well.

Some women claim Yasmin has actually helped them to lose weight. But researchers say they have found that side effect to be minimal.

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In a recent study by the company that produces Yasmin, 300 women reported losing 2 pounds within the first six months of taking it. But it didn't last, according to the study. All the women gained the weight back within a year.

"I don't feel there is a lot of evidence showing that this is something for weight loss," said gynecologist Dr. Linda Katz of Northwestern Memorial Hospital's Women's Group in Chicago. "In fact, this pill is not marketed for weight loss at all."

Katz said Yasmin is different from other oral contraceptives because of its ingredients. The progestin component in Yasmin is unique, she said.

"The progestin in this pill leads to less retention of water and bloating, and that's a complaint many young women have on birth control pills and even as part of premenstrual syndrome," Katz said.

Katz said that when it comes to weight loss, she won't be recommending Yasmin to her patients.

"There's no substitute for weight loss other than proper diet and exercise," Katz said.

Additional Resource:

• Yasmin Web site