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Jaitner, Annika and Vaudel, Marc and Tsaneva-Atanasova, Krasimira and Njølstad, Pål R and Jacobsson, Bo and Bowden, Jack and Johansson, Stefan and Freathy, Rachel M (2024) Smoking during pregnancy and its effect on placental weight: a Mendelian randomization study. BMC Pregnancy and Childbirth , 24 , (1) .