RT Book, Section
A1 Fitzgerald, Paul A.
A2 Papadakis, Maxine A.
A2 McPhee, Stephen J.
A2 Rabow, Michael W.
SR Print(0)
ID 1175787055
T1 Primary Amenorrhea
T2 Current Medical Diagnosis & Treatment 2021
YR 2021
FD 2021
PB McGraw-Hill Education
PP New York, NY
SN 9781260469868
LK accessmedicine.mhmedical.com/content.aspx?aid=1175787055
RD 2023/05/29
AB Menarche  ordinarily  occurs  between  ages  11  and  15  years  (average  in  the  United  States:  12.7  years)  (see  also  Chapter  18).  The  failure  of  any  menses  to  appear  is  termed  “primary  amenorrhea,”  and  evaluation  is  commenced  (1)  at  age  14  years  if  neither  menarche  nor  any  breast  development  has  occurred  or  if  height  is  in  the  lowest  3%,  or  (2)  at  age  16  years  if  menarche  has  not  occurred.