Distribution of gestational length in the second pregnancy by gestational length in the first pregnancy

Reproduced with permission from: Yang J, Baer RJ, Berghella V, et al. Recurrence of preterm birth and early term birth. Obstet Gynecol 2016; 128(2):364-372. Copyright © 2016 The American College of Obstetricians and Gynecologists. https://journals.lww.com/greenjournal/pages/default.aspx.