What condition is characterized by the absence of menstruation?

• A. Menorrhagia
• B. Amenorrhea
• C. Dysmenorrhea
• D. Oligomenorrhea

Answer: (B)

Amenorrhea is the medical term used to describe the absence of menstruation. This condition can be classified into two types: primary amenorrhea, where menstruation does not occur by the age of 15 in girls who have developed secondary sexual characteristics, and secondary amenorrhea, which refers to the absence of menstruation for three or more consecutive cycles in women who have previously menstruated. It can be caused by a variety of factors including hormonal imbalances, stress, significant weight loss or gain, and certain medical conditions.

Menorrhagia refers to abnormally heavy or prolonged menstrual bleeding, while dysmenorrhea describes painful menstruation. Oligomenorrhea indicates infrequent menstrual periods, typically defined as having cycles greater than 35 days apart but not completely absent. Each of these conditions relates to menstrual irregularities but does not define the complete absence of menstruation. Thus, amenorrhea specifically identifies the condition where menstruation is absent altogether.