By JANE E. BRODY (NYTimes)
The United States has one of the highest rates of unwanted pregnancies in the developed world — nearly half of pregnancies here are unintended, and there’s been no improvement in the situation for a decade.
Why? For one thing, women often encounter problems when the birth-control method they had been using no longer works well for them. Many women and their doctors are poorly versed in the wide array of effective choices and how to switch from one method to another without risking pregnancy.