According to Yahoo News:
Researchers compiling surveys from more than 2,000 women ages 15 to 24 found 31 percent had used the pull-out method, also known as withdrawal or coitus interruptus, over the last two years.
Of those women, 21 percent reported having an unintended pregnancy. In contrast, 13 percent of women who only used other forms of birth control got pregnant unintentionally.
“We found that people tend to use the withdrawal method when they're not really planning ahead,” Dr. Annie Dude, a resident in obstetrics and gynecology at the Duke University Medical Center in Durham, North Carolina, and lead author of the paper, said.
“It's a lot more common than many people realize,” she told Reuters Health.
And, Dude added, her study shows withdrawal doesn't work as well as other birth control methods for avoiding unintended pregnancies.
The most effective birth control methods are longer-term reversible contraceptives, such as intrauterine devices (IUDs) and implants that go under the skin. Less than one woman in 100 will get pregnant each year using these forms of birth control.
Along with participants who used the pull-out method, African American and poor women were more likely than others to have had an unintended pregnancy. Compared to women who only used other forms of birth control, seven percent more withdrawal users had also taken emergency contraception.
“The main point this study makes is that withdrawal as a form of contraception is more common than we thought,” Stanwood said.
It's so very comforting that the MAIN point of the study, the meat and fucking potatoes of it, was to determine that people are actually just using the pull and pray method. I'm not sure that there has been a grosser misuse of time and money in the history of fucking history. Everyone involved here — even DUDE lady — should be ashamed.