Researchers, whose findings were published in the journal Fertility & Sterility, said this is good news, since IUDs and contraceptive implants are the most effective forms of reversible birth control.
But in the United States they are still far from popular, with use lagging well behind birth control pills and condoms.
The study found that in 2009, 8.5 per cent of US women using birth control chose an IUD or implant, with the large majority going with the IUD.
That was up from just under four per cent in 2007.
“We saw some pretty notable growth,” said lead researcher Lawrence B. Finer of the Guttmacher Institute in New York, a sexual and productive health organization.
In France and Norway, about one-quarter of women on birth control use IUDs or implants, and in China 41 per cent, Finer’s team said.
When IUDs first came out, there were concerns – later disproved – that they might raise the risk of pelvic infection and jeopardize women’s future fertility. Some doctors in the United States still harbor misconceptions about their safety.
It’s not clear what’s behind the shift, but a combination of factors are likely at play, Finer told Reuters Health.