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. 2017 Jan;95(1):50–54. doi: 10.1016/j.contraception.2016.08.001

Table 4.

Analyses of combined of four WHO HRP studies looking at number of pregnancies, pregnancy rates

Variable (all four studies) Number of pregnancies Number of women Pregnancy Rate (%) Odds ratio (95%C.I.)
BMI (< 25) kg/m2 68 5428 1.25 1.00 (Ref)
[25–30) kg/m2 7 1140 0.61 0.96 (0.42–2.21)
[30 ++) kg/m2 6 295 2.03 8.27 (2.70–25.37)