That design, explained Rosser, seemed to allow for the growth of bacteria, which then contributed to pelvic inflammatory disease. "Those tails were acting like wicks," she said.
Newer IUDs have better designs, and haven't been associated with an increased risk of pelvic inflammatory disease, she noted.
For the current study, the researchers recruited 575 adult women at four sites across the United States. All of the women were undergoing uterine aspiration (sometimes referred to as D and C) due to miscarriages or planned abortion. All of the women in the study expressed an interest in getting an IUD.
The women were randomly selected to receive the IUD just after the uterine aspiration (immediate placement) or were scheduled to have the IUD inserted at their follow-up appointment two to six weeks later (delayed placement).
All of the women in the immediate group had an IUD inserted, while just 71.3 percent of those in the delayed group ended up getting an IUD, according to the study. No pregnancies occurred in the immediate placement group, while five of the women in the delayed group who had never gotten the IUD became pregnant.
After six months, 5 percent of the women in the immediate placement group had experienced an IUD expulsion, while 2.7 percent of the delayed insertion group did. Rates of complications didn't differ between the groups, the researchers noted.
Bednarek said that most of the women in the delayed group who ended up not getting an IUD hadn't changed their minds about wanting an IUD, but instead cited logistical reasons, such as transportation or not being able to get time off work or find child care as the reasons
All rights reserved