Figure 2:

Risk of spontaneous abortion associated with use of antibiotics during pregnancy (3 comparator groups: no antibiotic use, exosure to penicillins and exposure to cephalosporins). Values greater than 1.0 indicate an increased risk of spontaneous abortion. CI = confidence interval, OR = odds ratio. ^*Odds ratios were adjusted for covariates listed in Methods. ^†Includes cefixime, cefuroxime, cefaclor and cefprozil. ^‡Includes pivampicillin, ampicillin and cloxacillin sodium. ^§Includes spiramycin and telithromycin. ^¶Includes moxifloxacin and ofloxacin. ^**Includes tetracycline and demethylchlortetracycline.