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Journal
- american journal of obstetrics and gynecology31
- american journal of perinatology22
- journal of perinatal medicine15
- obstetrical & gynecological survey12
- acta obstetricia et gynecologica scandinavica11
- european journal of obstetrics & gynecology and reproductive biology10
- obstetrics and gynecology clinics of north america9
- obstetrical and gynecological survey8
- european journal of obstetrics and gynecology7