TY  - CHAP
M1  - Book, Section
TI  - Emergency Delivery: Normal Vertex Delivery Sequence
A1  - Dooley-Hash, Suzanne
A1  - Knoop, Kevin J.
A2  - Knoop, Kevin J.
A2  - Stack, Lawrence B.
A2  - Storrow, Alan B.
A2  - Thurman, R. Jason
Y1  - 2021
N1  - 
T2  - The Atlas of Emergency Medicine, 5e
AB  - A  gravid  woman  may  present  in  any  stage  of  labor.  Those  with  regular  forceful  contractions  and  the  urge  to  push  are  in  active  labor  (2nd  stage)  and  may  be  near  delivery.  This  stage  begins  when  the  cervix  is  fully  dilated,  which  allows  for  the  gradual  descent  of  the  fetal  head  toward  the  vaginal  outlet.  As  the  head  approaches  the  perineum,  the  labia  begin  to  separate  with  each  contraction  and  recede  once  the  contraction  subsides.  Crowning  refers  to  separation  of  the  labia  by  the  head  that  does  not  recede  at  the  end  of  the  contraction.  The  appearance  of  crowning  heralds  imminent  vaginal  delivery.  At  this  point,  transfer  from  the  ED  is  not  advised  and  preparations  for  delivery  should  begin  immediately.  
SN  - 
PB  - McGraw-Hill
CY  - New York, NY
Y2  - 2024/04/18
UR  - accessmedicine.mhmedical.com/content.aspx?aid=1181041765
ER  -