?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Peycheva%2C+Darina&rft.aufirst=Darina&rft.aulast=Peycheva&rft.date=8+November+2022&rft.atitle=Risk+factors+for+natural+menopause+before+the+age+of+45%3A+evidence+from+two+British+population-based+birth+cohort+studies&rft.volume=22&rft.title=BMC+Women's+Health&rft.issn=1472-6874&rft.genre=article