RT Book, Section
A1 Cooper, Danielle B.
A1 Mayeaux, Jr., E.J.
A2 Usatine, Richard P.
A2 Smith, Mindy A.
A2 Mayeaux, Jr., E.J.
A2 Chumley, Heidi S.
SR Print(0)
ID 1164351276
T1 Second Trimester Obstetrical Ultrasound
T2 The Color Atlas and Synopsis of Family Medicine, 3e
YR 2019
FD 2019
PB McGraw-Hill Education
PP New York, NY
SN 9781259862045
LK accessmedicine.mhmedical.com/content.aspx?aid=1164351276
RD 2024/04/16
AB A  23-year-old  pregnant  gravida  2,  para  1  woman  is  being  seen  for  ultrasound  because  of  her  uncertain  dates.  Her  best  recollection  of  her  last  period  gave  her  an  estimated  gestational  age  (EGA)  of  19  weeks.  Her  vital  signs  are  normal  and  her  fundal  height  is  20  cm.  Figures  80-1,  80-2,  80-3  are  still  images  taken  from  her  ultrasound  examination  demonstrating  an  EGA  of  21  weeks  and  6  days  by  measurement  of  the  baby's  biparietal  diameter  (BPD),  head  circumference  (HC),  abdominal  circumference  (AC),  and  femur  length  (FL).  All  four  measurements  allow  the  computer  to  calculate  an  estimated  fetal  weight  of  431  g.  The  pregnancy  proceeded  without  complications,  and  the  patient  delivered  a  healthy  boy  at  403/7  weeks  based  on  the  ultrasound-calculated  estimated  date  of  delivery.  No  interventions  were  needed  for  postdates  because  of  the  ultrasound  calculations  earlier  in  the  pregnancy.