3. Secondary amenorrhea: MedlinePlus Medical Encyclopedia
Secondary amenorrhea occurs when a woman who has been having normal menstrual cycles stops getting her periods for 6 or more months.
MedlinePlus (Offsite)

4. Amenorrhea - primary
Amenorrhea is the absence of menstruation. Primary amenorrhea is not considered to have occurred until a girl is beyond age 16, if she has undergone other normal changes that occur during puberty.
www.uhseast.com

5. Amenorrhea - Primary Symptoms & Treatment
Primary amenorrhea; No periods - primary; Absent periods - primary; Absent menses - primary; Absence of periods - primary
www.christusschumpert.org

6. Primary amenorrhea - Shands Healthcare
Primary amenorrhea is the absence of the menstrual period by the age of 16. Treatment of amenorrhea may range from hormonal supplementation for developmental abnormalities of the reproductive system to surgery for tumors of the pituitary.
shands.org

7. Index of /html
Index of /html
www.agsdus.org

8. Amenorrhea, Primary: eMedicine Obstetrics and Gynecology
Primary amenorrhea is the failure of menses to occur by age 16 years, in the presence of normal growth and secondary sexual characteristics. If by age 13, menses has not occurred and the onset of puberty, such as breast development, is absent, a w...
emedicine.medscape.com

9. Index of /gladstone/html
Index of /gladstone/html
www.gladstone.ucsf.edu

10. Amenorrhea
Amenorrhea is the absence of a monthly period. Women normally do not menstruate before puberty, during pregnancy, and after menopause. If amenorrhea happens at other times, it may be the symptom of a treatable medical condition.
my.clevelandclinic.org