Comparison 8. Pregnancy outcomes.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Normal infant	8	8782	Risk Ratio (IV, Random, 95% CI)	1.00 [0.97, 1.02]
2 Spontaneous abortion/miscarriage	9	8618	Risk Ratio (IV, Random, 95% CI)	0.88 [0.68, 1.14]
3 Elective termination/induced abortion	9	10909	Risk Ratio (IV, Random, 95% CI)	0.90 [0.80, 1.02]
4 Stillbirth	6	8754	Risk Ratio (IV, Random, 95% CI)	1.12 [0.68, 1.83]
5 Abnormal infant	5	9252	Risk Ratio (IV, Random, 95% CI)	1.22 [0.88, 1.69]