Gynecology Book


Primary Amenorrhea

Aka: Primary Amenorrhea, Delayed Menarche
  1. See Also
    1. Amenorrhea
    2. Secondary Amenorrhea
    3. Delayed Puberty
    4. Hypogonadism
  2. Definition
    1. No secondary sexual characteristics by 13 years old or
    2. No menstrual period by (failure to reach Menarche by):
      1. Fifteen years old or
      2. Five years after initial Breast development or
      3. One year beyond Family History
  3. Causes
    1. See Hypogonadism
    2. Axis 1: Hypothalamus or Central
      1. Anovulation (10% of primary causes)
      2. Constitutional (6% of primary causes): Family History
      3. Gonadotropin deficiency such as Kallmann's Syndrome (Rare): Associated with Anosmia
    3. Axis 2: Pituitary
      1. Hyperprolactinemia (2% of primary causes)
      2. Pituitary Tumor (8% of primary causes)
        1. Pituitary Adenoma (hormone producing)
        2. Pituitary Null Cell Tumor (No hormone produced)
        3. Empty Sella Syndrome
        4. Pituitary Tuberculosis
        5. Pituitary Schistosomiasis
    4. Axis 3: Ovarian
      1. Polycystic Ovary Syndrome (10% of primary causes)
        1. Findings: Obesity, Hirsutism, and Acne Vulgaris
      2. Turner Syndrome and Mosaics (30% of primary causes)
        1. Findings: Short Stature, Web neck, and Shield Chest
        2. May present as Amenorrhea and Short Stature alone
      3. Genetic Male (10% of primary causes)
      4. Gonadal dysgenesis
    5. Axis 4: Uterus
      1. Mullerian Agenesis (20% of primary causes)
        1. Mayer-Rokitansky-Kuster-Hauser Syndrome
      2. Imperforate Hymen
      3. Transverse vaginal septum
      4. Complete androgen resistance
  4. Labs
    1. Urine Pregnancy Test (UPT)
    2. Serum Luteinizing hormone (LH)
    3. Serum Follicle Stimulating Hormone (FSH)
    4. Thyroid Stimulating Hormone(TSH)
    5. Serum Prolactin
  5. Imaging
    1. Pelvic Ultrasound
  6. Approach: Primary Amenorrhea Algorithm
    1. See Female Tanner Stage for Sexual Development
    2. Abnormal Breast development and Female Tanner Stage
      1. Normal Height with low gonadotopins (FSH, LH <5 IU)
        1. See Hypogonadotropic Hypogonadism
        2. Obtain Karyotype (previously Buccal Smear)
          1. Karyotype normal
            1. GnRH Deficient
            2. Functional Amenorrhea
            3. Constitutional delay of Puberty
          2. Karyotype abnormal
            1. Pure Gonadal dysgenesis
      2. Short Height and excess gonadotropins (FSH>20, LH>40)
        1. See Hypergonadotropic Hypogonadism
        2. Reflects Primary Ovarian Insufficiency
        3. Obtain Karyotype (previously Buccal Smear)
          1. Karyotype 46XX
            1. Pituitary Defect
          2. Karyotype 45XO
            1. Turner's Syndrome
    3. Normal Breast development and Female Tanner Stage
      1. Uterus Absent on Ultrasound
        1. Karyotype (previously Buccal Smear)
        2. Karyotype 46XX
          1. Mullerian agenesis (Mullerian Dysgenesis)
          2. Serum Testosterone in normal female range
        3. Karyotype 46XY
          1. Androgen insensitivity syndrome (Male Pseudo-Hermaphrodite)
          2. Serum Testosterone in normal Male range
      2. Uterus Present on Ultrasound
        1. Consider obstruction to flow
          1. Imperforate Hymen
          2. Transverse vaginal septum
        2. Consider Hyperandrogenism (e.g. Hirsutism)
          1. Polycystic Ovary Syndrome
          2. Adrenal tumor
          3. Ovarian tumor
        3. Consider other causes
          1. See Secondary Amenorrhea
          2. Delayed Puberty
          3. New pituitary Tumor
  7. References
    1. (2008) Fertil Steril 90(5 suppl): S219-25 [PubMed]
    2. Klein (2013) Am Fam Physician 87(11): 781-88 [PubMed]
    3. Master-Hunter (2006) Am Fam Physician 73:1374-87 [PubMed]
    4. Pletcher (1999) Pediatr Clin North Am 46:505-18 [PubMed]
    5. Timmreck (2003) Obstet Gynecol Clin North Am 30:287-302 [PubMed]

Primary physiologic amenorrhea (C0232939)

Definition (NCI) Abnormally late or absent menarche in a female with normal secondary sexual characteristics.(NICHD)
Concepts Disease or Syndrome (T047)
ICD10 N91.0
SnomedCT 156035004, 8913004
Dutch primaire amenorroe, amenorroe; primair, primair; amenorroe, Primaire amenorroe
French Aménorrhée primaire, Aménorrhée primitive
German Amenorrhoe primaer, primaere Amenorrhoe, Primaere Amenorrhoe
Italian Amenorrea primaria
Portuguese Amenorreia primária
Spanish Amenorrea primaria, amenorrea fisiológica primaria (hallazgo), amenorrea fisiológica primaria, amenorrea primaria
Japanese 原発性無月経, 原発性無月経症, ゲンパツセイムゲッケイショウ, ゲンパツセイムゲッケイ
English primary amenorrhea, primary amenorrhea (diagnosis), Amenorrhoea primary, amenorrhea primary, Amenorrhea, primary, Primary amenorrhoea (finding), Primary Amenorrhea, Delayed Menarche, Primary physiologic amenorrhea, Primary amenorrhea, Primary amenorrhoea, Primary physiologic amenorrhoea, Primary physiologic amenorrhea (finding), Amenorrhea primary, primary; amenorrhea, amenorrhea; primary, primary amenorrhoea, Amenorrhea;primary, Amenorrhoea;primary
Czech Primární amenorea, Amenorea primární
Korean 원발성 무월경
Hungarian Primaer amenorrhoea, primaer amenorrhoea
Derived from the NIH UMLS (Unified Medical Language System)

You are currently viewing the original '\legacy' version of this website. Internet Explorer 8.0 and older will automatically be redirected to this legacy version.

If you are using a modern web browser, you may instead navigate to the newer desktop version of fpnotebook. Another, mobile version is also available which should function on both newer and older web browsers.

Please Contact Me as you run across problems with any of these versions on the website.

Navigation Tree