For birth control, what's old is new again

Story highlights

  • Some 30% of women quit hormonal birth control because of the side effects
  • An increasing number of women are using apps to track body temperature and fertility to avoid pregnancy
  • Charting body changes so closely can make this a difficult method for some, doctors say

(CNN)"I can't afford to get pregnant," says 25-year-old Aisha Mukooza.

So every morning, for the past two and a half years, Aisha's been strict about taking her temperature as soon as her alarm goes off at 6 a.m.
"I have my thermometer under my pillow. I take it, and then take the reading and put it in Kindara," Mukooza says.
    Kindara is an app on her phone that helps her chart her temperatures. As Mukooza explained, "the temps, when I ovulate, it rises."
    She is part of a growing movement of young women who are saying no to hormonal birth control and yes to a kind of birth control that sounds at first like a real throwback with a little extra high-tech twist.
    These women are using Natural Family Planning, also known as Fertility Awareness Methods (FAM).
    Many experts caution that this is one of the least successful methods to use, because it can be so complicated to do correctly. But with new technology, some women think it is the best option for them.
    While many women use these methods to help with conception, an increasing number are using these same methods to avoid getting pregnant.
    Born initially out of the Catholic Church, FAM is starting to lose its religious connotation as more secular woman turn to it. Many say they are wary of the effects of hormonal birth control.
    According to the Centers for Disease Control and Prevention, just between 1-3% of women use FAM as a form of contraception. However, a study from the University of Iowa found that if more women knew about it, 1 in 5 women would actually consider it as