A recent study on a male contraceptive injection was discontinued after reports of depression. Yet birth control methods for women that are on the market today have similar reports of depression. Are there differences to the way studies are undertaken?

New research suggests women's birth control — like the pill, patch, and IUD — is tied to an increased risk of depression.

NuvaRing, which was approved for use in the U.S. in 2001 and a year later in Canada, has sparked numerous lawsuits involving thousands of women.