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Journal
- human reproduction19
- fertility and sterility14
- bjog: an international journal of obstetrics and gynaecology6
- human fertility3
- human reproduction (oxford, england)3
- bjog : an international journal of obstetrics and gynaecology2
- bjog: an international journal of obstetrics & gynaecology2
- human fertility (cambridge, england)2
- acta geneticae medicae et gemellologiae: twin research1