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- birth: issues in perinatal care85
- bjog: an international journal of obstetrics & gynaecology58
- australian & new zealand journal of obstetrics & gynaecology46
- international journal of gynecology & obstetrics40
- tropical medicine & international health32
- paediatric & perinatal epidemiology28
- acta obstetricia et gynecologica scandinavica22
- health services research20
- maternal & child nutrition20