BACKGROUND: Male marijuana use has increased steadily over the last decade, but its effect on risk of spontaneous abortion to our knowledge has not been studied. METHODS: We analyzed data from Pregnancy Study Online, a North American prospective cohort study of pregnancy planners (2013-2019). During the preconception period, male and female participants completed baseline questionnaires on demographics, medical history, and behavioral factors, including marijuana use. Female participants identified pregnancy losses on bimonthly follow-up questionnaires and questionnaires completed in early and late pregnancy. We categorized frequency of male marijuana use in the 2 months before baseline as none, <1 time/week, or ≥1 time/week. We estimated the association between preconception male marijuana use and spontaneous abortion, adjusting for male and female confounders. RESULTS: Among 1535 couples who conceived during follow-up, 9% of men reported preconceptional marijuana use <1 time/week and 8% ≥1 time/week. Nineteen percent of pregnancies ended in spontaneous abortion. Compared with no use, adjusted hazard ratios (HRs) for male marijuana use were 1.1 (95% confidence interval [CI] = 0.64, 1.7) for <1 time/week and 2.0 (95% CI = 1.2, 3.1) for ≥1 time/week. The association for ≥1 time/week persisted after restricting to couples where the female partner did not use marijuana (HR = 2.0, 95% CI = 1.1, 3.3), and was stronger for losses at <8 weeks' gestation (HR = 2.5, 95% CI = 1.4, 4.3) and among males aged ≥35 years (HR = 4.1, 95% CI = 1.54, 11). CONCLUSIONS: Couples with male partners who used marijuana ≥1 time/week during preconception had greater risk of spontaneous abortion than couples with males who did not use marijuana.
BACKGROUND: Male marijuana use has increased steadily over the last decade, but its effect on risk of spontaneous abortion to our knowledge has not been studied. METHODS: We analyzed data from Pregnancy Study Online, a North American prospective cohort study of pregnancy planners (2013-2019). During the preconception period, male and female participants completed baseline questionnaires on demographics, medical history, and behavioral factors, including marijuana use. Female participants identified pregnancy losses on bimonthly follow-up questionnaires and questionnaires completed in early and late pregnancy. We categorized frequency of male marijuana use in the 2 months before baseline as none, <1 time/week, or ≥1 time/week. We estimated the association between preconception male marijuana use and spontaneous abortion, adjusting for male and female confounders. RESULTS: Among 1535 couples who conceived during follow-up, 9% of men reported preconceptional marijuana use <1 time/week and 8% ≥1 time/week. Nineteen percent of pregnancies ended in spontaneous abortion. Compared with no use, adjusted hazard ratios (HRs) for male marijuana use were 1.1 (95% confidence interval [CI] = 0.64, 1.7) for <1 time/week and 2.0 (95% CI = 1.2, 3.1) for ≥1 time/week. The association for ≥1 time/week persisted after restricting to couples where the female partner did not use marijuana (HR = 2.0, 95% CI = 1.1, 3.3), and was stronger for losses at <8 weeks' gestation (HR = 2.5, 95% CI = 1.4, 4.3) and among males aged ≥35 years (HR = 4.1, 95% CI = 1.54, 11). CONCLUSIONS: Couples with male partners who used marijuana ≥1 time/week during preconception had greater risk of spontaneous abortion than couples with males who did not use marijuana.
Authors: Scott A Venners; Xiaobin Wang; Changzhong Chen; Lihua Wang; Dafang Chen; Wenwei Guang; Aiqun Huang; Louise Ryan; John O'Connor; Bill Lasley; James Overstreet; Allen Wilcox; Xiping Xu Journal: Am J Epidemiol Date: 2004-05-15 Impact factor: 4.897
Authors: Lauren A Wise; Amelia K Wesselink; Elizabeth E Hatch; Kenneth J Rothman; Ellen M Mikkelsen; Henrik Toft Sørensen; Shruthi Mahalingaiah Journal: J Epidemiol Community Health Date: 2017-12-22 Impact factor: 3.710
Authors: Lauren A Wise; Kenneth J Rothman; Ellen M Mikkelsen; Joseph B Stanford; Amelia K Wesselink; Craig McKinnon; Siobhan M Gruschow; Casie E Horgan; Aleta S Wiley; Kristen A Hahn; Henrik Toft Sørensen; Elizabeth E Hatch Journal: Paediatr Perinat Epidemiol Date: 2015-07 Impact factor: 3.980
Authors: Penelope P Howards; Enrique F Schisterman; Charles Poole; Jay S Kaufman; Clarice R Weinberg Journal: Am J Epidemiol Date: 2012-08-17 Impact factor: 4.897