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- american journal of obstetrics and gynecology34
- bmc pregnancy and childbirth16
- bmc pregnancy & childbirth10
- acta obstetricia et gynecologica scandinavica9
- archives of gynecology and obstetrics9
- british journal of midwifery9
- midwifery8
- ultrasound in obstetrics & gynecology8
- american journal of obstetrics & gynecology5