Acta Obstetricia et Gynecologica ScandinavicaVolume 45, Issue 4 p. 389-410 Influence of Heredity and Environment on Normal Menstrual Blood Loss A Study of Twins GÖran Rybo, GÖran Rybo Department of Obstetrics and Gynaecology, University of Göteborg, Sweden Department of Internal Medicine II, University of Göteborg, SwedenSearch for more papers by this authorLeif Hallberg, Leif Hallberg Department of Obstetrics and Gynaecology, University of Göteborg, Sweden Department of Internal Medicine II, University of Göteborg, SwedenSearch for more papers by this author GÖran Rybo, GÖran Rybo Department of Obstetrics and Gynaecology, University of Göteborg, Sweden Department of Internal Medicine II, University of Göteborg, SwedenSearch for more papers by this authorLeif Hallberg, Leif Hallberg Department of Obstetrics and Gynaecology, University of Göteborg, Sweden Department of Internal Medicine II, University of Göteborg, SwedenSearch for more papers by this author First published: January 1966 https://doi.org/10.3109/00016346609158460Citations: 19AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume45, Issue4January 1966Pages 389-410 RelatedInformation