Fig. 2

Long-term relative risk of breast cancer after an early age childbirth compared with one childbirth less, according to duration of pregnancy. a Denmark, b Norway, and c combined. Error bars indicate 95% confidence intervals
Long-term relative risk of breast cancer after an early age childbirth compared with one childbirth less, according to duration of pregnancy. a Denmark, b Norway, and c combined. Error bars indicate 95% confidence intervals