A new study finds 25 percent of women with rheumatoid arthritis had tried unsuccessfully for at least a year before they finally got pregnant.
Also, 10 percent of women with RA had been treated for infertility compared with just 8 percent of other women.
Scientist's say it's not clear whether RA or the drugs used to treat it might interfere with a woman's fertility.
The study in the journal Arthritis and Rheumatism does not definitively answer that question and adds that other factors might explain the longer time to pregnancy among women with RA.
