<P> Although, there is a noticeable decline in U.S. teen pregnancy the current rate is still 2 - 4 times more than in the other four countries . The biggest difference in the rate of pregnancies in the United States compared to the other countries is that in America there is a very high unintended pregnancy rate . This unintended pregnancy rate is higher than the total teenage pregnancy rate in all of the four countries . </P> <P> In 2010 there was a rate of 57 pregnancies per 1,000 women aged 15--19 . Most of those women reported that it was an unplanned pregnancy . This shows a 15% drop in pregnancies from 2008 to 2010 . There is a huge decline in adolescent pregnancy for the nation as a whole . The cause of these declines are from abstaining from sex or better use of contraceptives . Birth rates among younger teens ages 15--17 have also fallen faster--dropping by 50%, compared with a 39% decline among older teens ages 18 and 19 . Researchers have concluded that these declines stem from improvement in use of contraceptives . </P>

When did teenage pregnancy become a problem in the us