In many cases, the cause of primary amenorrhea is not known.

Primary amenorrhea is when a young woman has not had her first period by the age of 16.

The rate of primary amenorrhea in the United States is less than 1%.

Primary amenorrhea may occur with or without other signs of puberty.

Possible causes of primary amenorrhea (when a woman never gets her first period) include:

The term "primary amenorrhea" is used if periods have never started in females aged 16 or older.

Primary amenorrhea is when a girl has not yet started her monthly periods, and she:

Primary amenorrhea is diagnosed if you reach the age of 18 and haven't yet begun to menstruate.

Young women with primary amenorrhea that is caused by birth defects may require medicine, surgery, or both.

A complete transverse will block menstrual flow and is a cause of primary amenorrhea.

Primary amenorrhea is when a female reaches 16 years of age without experiencing a regular menstrual cycle.

Symptoms may also include scoliosis and primary amenorrhea.

Primary amenorrhea typically occurs when a girl is older than 15, if she has undergone other normal changes that occur during puberty.

Absence of menses by age 16-18 constitutes Primary Amenorrhea.

Primary amenorrhea and cyclical lower abdominal pain are the chief presenting complaints of hematocolpos.

Females will have primary amenorrhea.

Primary amenorrhea is characterized by delayed menarche.

Conditions associated with primary amenorrhea include:

There are two types of amenorrhea: primary amenorrhea and secondary amenorrhea.

Turner syndrome is characterized by primary amenorrhea, premature ovarian failure, streak gonads and infertility.

The patient with MRKH syndrome will have primary amenorrhea.

Causes of primary amenorrhea:

Women with 46 XX gonadal dysgenesis experience primary amenorrhea with hypergonadotropic hypogonadism.

When menarche has failed to occur for more than 3 years after thelarche, or beyond 16 years of age, the delay is referred to as 'primary amenorrhea'.

The lack of estrogen results in the presentation of primary amenorrhea and tall stature; the latter occurs because estrogen normally causes fusion of the epiphyseal growth plates.