RT Book, Section A1 Jones, Griffith D. A2 Posner, Glenn D. A2 Dy, Jessica A2 Black, Amanda A2 Jones, Griffith D. SR Print(0) ID 1106378196 T1 Preterm Labor T2 Oxorn-Foote Human Labor & Birth, 6e YR 2015 FD 2015 PB McGraw-Hill Medical PP New York, NY SN 9780071740289 LK obgyn.mhmedical.com/content.aspx?aid=1106378196 RD 2024/03/29 AB In pregnancy, term refers to the gestational period from 37+0 to 41+6 weeks. Preterm births occur between 24+0 and 36+6 weeks. Although births earlier than this are referred to as miscarriages, occasional survivors are seen after delivery at 23 weeks, which has become the “gray zone” for viability.