Figure 3.

Age difference in timing of puberty among daughters in relation to maternal smoking in the first trimester of pregnancy, Puberty Cohort, Danish National Birth Cohort, Denmark, 2012–2017. Estimated age differences in timing of puberty with 95% confidence intervals (CIs). The referent was nonsmoking mothers, and the analysis adjusted for prepregnancy body mass index, alcohol units per week in the first trimester, time to pregnancy (including assisted reproductive technology), highest social class of parents, maternal age at menarche, maternal age at delivery, parity, and cohabitation of parents during pregnancy. B2–5, breast stages 2–5; PH2–5, pubic hair stages 2–5.