TY - CHAP M1 - Book, Section TI - Preterm Labor A1 - Jones, Griffith D. A2 - Posner, Glenn D. A2 - Black, Amanda Y. A2 - Jones, Griffith A2 - El-Chaâr, Darine PY - 2022 T2 - Oxorn-Foote Human Labor & Birth, 7e 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 22+0 to 23+6 weeks, which has become the “gray zone” for viability. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/08 UR - obgyn.mhmedical.com/content.aspx?aid=1193314221 ER -