article 2007 Country of birth and hospitalization for pelvic inflammatory disease, ectopic pregnancy, endometriosis, and infertility: a nationwide study of 2 million women in Sweden Fertility and sterility ·doi:10.1016/j.fertnstert.2007.07.1345
article 2004 Effects of alcohol consumption on female fertility during an 18-year period Fertility and Sterility ·doi:10.1016/j.fertnstert.2003.06.018