RT Book, Section
A1 Fleischer, Arthur C.
A1 Diamond, Michael P.
A1 Cartwright, Peter S.
A1 New, Melinda
A2 Fleischer, Arthur C.
A2 Toy, Eugene C.
A2 Lee, Wesley
A2 Manning, Frank A.
A2 Romero, Roberto J.
SR Print(0)
ID 1106704245
T1 TRANSVAGINAL SONOGRAPHY OF ECTOPIC PREGNANCY
T2 Sonography in Obstetrics and Gynecology: Principles & Practice, 7e
YR 2015
FD 2015
PB McGraw-Hill Education
PP New York, NY
SN 9780071547727
LK obgyn.mhmedical.com/content.aspx?aid=1106704245
RD 2024/04/23
AB DefinitionsDiscriminatory  zone:  β-hCG  value  above  which  evidence  of  an  intrauterine  pregnancy  should  be  seen  on  transvaginal  sonography.Doubling  time:  Expected  time  interval  when  the  β-hCG  level  doubles  in  a  normal  early  intrauterine  pregnancy.  The  expected  normal  increase  of  hCG  is  greater  than  or  equal  to  50%  in  48  hours.Pregnancy  of  "unknown  location":  pregnancy  whose  location  (intra-  or  extrauterine)  cannot  be  determined  sonographically.