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Journal
- american journal of obstetrics and gynecology33
- american journal of obstetrics & gynecology18
- archives of gynecology and obstetrics18
- international journal of gynecology & obstetrics17
- archives of gynecology & obstetrics12
- journal of maternal-fetal & neonatal medicine12
- obstetrics & gynecology8
- bmc pregnancy and childbirth6
- international journal of gynaecology and obstetrics the official organ of the international federation of gynaecology and obstetrics5