A growing number of teen girls in the US say they use the rhythm method for birth control, and more teens also think it's okay for an unmarried female to have a baby, according to a government survey. The report may help explain why the teen pregnancy rate is no longer dropping.
Overall, teenage use of birth control and teen attitudes toward pregnancy have remained about the same since a similar survey was done in 2002.
But there were some notable exceptions in the new survey by the Centres for Disease Control and Prevention. First, about 17% of sexually experienced teen girls say they had used the rhythm method - timing their sex to avoid fertile days to prevent getting pregnant. That's up from 11% in 2002.
They may have been using another form of birth control at the same time. But the increase is considered worrisome because the rhythm method doesn't work about 25% of the time, said Joyce Abma, the report's lead author. She's a social scientist at the CDC's National Centre for Health Statistics.
How the survey was done
The survey results were based on face-to-face interviews with nearly 2 800 teens ages 15 through 19 at their homes in the years 2006 through 2008.
Trained female interviewers asked the questions. It found that about 42% of never-married teens had had sex at least once in their life. Of those teens, 98% said they'd used birth control at least once, with condoms being the most common choice.
Those findings were about the same as in the 2002 survey.
The increase in the rhythm method may be part of the explanation for recent trends in the teen birth rate. The teen birth rate declined steadily from 1991 through 2005, but rose from 2005 to 2007. It dropped again in 2008, by 2%.
"We've known the decline in childbearing stalled out. This report kind of fills in the why," said Bill Albert, a spokesman for the National Campaign to Prevent Teen Pregnancy.
'It's ok to be an unmarried mom'
Teen attitudes may be big part of it. Nearly 64% of teen boys said it's okay for an unmarried female to have a child, up from 50% in 2002. More than 70% of teen girls agreed, up from 65%, though the female increase was not statistically significant.
The survey was conducted at a time of some highly publicised pregnancies of unmarried teens, including the Bristol Palin, the daughter of former Republican vice presidential candidate Sarah Palin, and Jamie Lynn Spears, Britney's kid sister. The 2007 movie "Juno," a happy-ending tale of a teen girl's accidental pregnancy, was popular at the time. - (Sapa, June 2010)