Comparison 4. Estrogen versus placebo/no treatment among women receiving conventional uterotonics for primary PPH.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Hysterectomy	1	112	Risk Ratio (M‐H, Fixed, 95% CI)	0.16 [0.01, 3.11]
2 Mean blood loss within two hours	1	112	Mean Difference (IV, Fixed, 95% CI)	‐274.9 [‐384.72, ‐165.08]
3 Mean blood loss between two and 24 hours	1	112	Mean Difference (IV, Fixed, 95% CI)	‐50.7 [‐83.07, ‐18.33]