Amenorrhea refers to the absence of menstruation for a defined period. It is a symptom, not a disease.
Types of Amenorrhea
1.
Physiological Amenorrhea
Occurs naturally in:
- Prepubertal phase
- During pregnancy
- Lactation
- Postmenopausal phase
2.
Pathological Amenorrhea
Divided
into:
- Primary Amenorrhea: Absence of menstruation by 16 years of age with normal secondary sexual
characteristics or by 14 years if
no secondary sexual development.
- Secondary Amenorrhea: Cessation of menstruation for three or more cycles in a woman with previously
normal menstruation.
1.
Hypothalamic Causes
- Hypogonadotropic
Hypogonadism
- Constitutional Delay
- Chronic illness (malnutrition, tuberculosis, diabetes, renal
failure)
- Anorexia nervosa & extreme weight loss
- Intense exercise (Athletic Amenorrhea)
- Kallmann Syndrome (Hypogonadotropic Hypogonadism with Anosmia)
2.
Pituitary Causes
- Hyperprolactinemia (Increased prolactin inhibits GnRH
secretion)
- Prolactinoma (Pituitary Adenoma)
- Sheehan’s Syndrome (Postpartum Pituitary Necrosis)
- Cushing’s Disease
- Empty Sella Syndrome
- Hypopituitarism (Deficiency of gonadotropins FSH
& LH)
3.
Ovarian Causes
- Primary Ovarian Failure
(Hypergonadotropic Hypogonadism)
- Turner Syndrome (45, X0 karyotype, streak ovaries, short stature)
- Pure Gonadal Dysgenesis (46, XX or 46, XY karyotype)
- Resistant Ovary Syndrome (Savage Syndrome)
- Premature Ovarian Failure (POF) – Ovarian failure before 40 years
- Polycystic Ovarian Syndrome
(PCOS)
- Chronic anovulation, hyperandrogenism, insulin resistance
4.
Uterine & Outflow Tract Causes
- Congenital Malformations
- Müllerian Agenesis (Mayer-Rokitansky-Küster-Hauser Syndrome) –
Absent uterus & upper vagina with normal ovaries
- Imperforate Hymen or Transverse Vaginal Septum – Causes cryptomenorrhea (Menstrual blood trapped in uterus
or vagina)
- Acquired Causes
- Asherman’s Syndrome – Endometrial scarring due to repeated
curettage or infections (TB)
5.
Endocrine Causes
- Hypothyroidism (Increased
TRH → Increased Prolactin → Suppresses GnRH)
- Hyperthyroidism
- Cushing’s Syndrome (Excess
Cortisol Inhibits GnRH)
- Congenital Adrenal
Hyperplasia (CAH)
- 21-hydroxylase deficiency → Increased Androgens → Anovulation
Clinical Features of Amenorrhea
·
Primary Amenorrhea
- No menarche by
16 years
- No secondary
sexual characteristics (breast development, pubic hair)
- Short stature,
webbed neck (Turner Syndrome)
·
Secondary Amenorrhea
- History of
normal menstrual cycles before cessation
- Weight loss,
excessive exercise
- Galactorrhea (in
Hyperprolactinemia cases)
- Hirsutism, acne (PCOS cases)
Investigations for Amenorrhea
1.
General Blood Tests
- Complete Blood Count (CBC)
- Thyroid Function Tests (T3,
T4, TSH)
- Fasting Blood Sugar (For
PCOS, Diabetes Screening)
2.
Hormonal Assays
- Serum FSH, LH → Ovarian Failure (High FSH & LH
in Primary Ovarian Insufficiency)
- Serum Prolactin → Hyperprolactinemia (>100 ng/mL
in Prolactinoma)
- Serum Testosterone &
DHEAS → PCOS,
Androgen-Secreting Tumors
- Serum Estradiol (E2) → Ovarian Function
3.
Imaging Studies
- Pelvic Ultrasound – Detects uterus, ovaries, endometrial thickness
- MRI Brain – Detects pituitary tumors (Prolactinoma, Sheehan’s Syndrome)
- Karyotyping (Chromosomal
Analysis) –
Turner Syndrome (45, X0), Androgen Insensitivity Syndrome (46, XY)
4.
Special Tests
·
Progestin Challenge Test (PCT)
- Positive (Withdrawal Bleed) – Indicates anovulation
(PCOS)
- Negative (No Bleed) – Indicates Endometrial or
Outflow Tract Abnormality
·
Estrogen + Progestin Challenge
Test
- No Bleeding
– Suggests Asherman’s Syndrome,
Müllerian Agenesis
·
Hysteroscopy / Hysterosalpingography
(HSG)
- Detects endometrial scarring (Asherman’s Syndrome), uterine abnormalities
Management & Treatment
1.
Treatment Based on Underlying Cause
·
Hypothalamic Amenorrhea (Weight
Loss, Exercise-Induced)
- Nutritional Rehabilitation
- Reduction of physical stress (Exercise Moderation)
- Cognitive Behavioral Therapy (CBT) for Eating Disorders
·
Hyperprolactinemia (Prolactinoma,
Increased Prolactin)
- Dopamine Agonists (Cabergoline, Bromocriptine)
- Transsphenoidal Surgery for Large Pituitary Tumors
·
Ovarian Failure (Turner Syndrome,
POI)
- Hormone Replacement Therapy (HRT) – Estrogen + Progesterone
- Egg Donation (For Pregnancy)
·
Polycystic Ovarian Syndrome
(PCOS)
- Lifestyle Modification (Weight Loss, Exercise, Diet)
- Oral Contraceptive Pills (OCPs) – Regulate Menstrual Cycles
- Metformin – For Insulin Resistance
- Clomiphene Citrate – Ovulation Induction (For Infertility)
·
Müllerian Agenesis (MRKH
Syndrome, Absent Uterus)
- Vaginal Dilators (For Functional Vagina Creation)
- Surgical Neovagina Creation (McIndoe Vaginoplasty, Vecchietti
Procedure)
·
Asherman’s Syndrome (Endometrial
Scarring)
- Hysteroscopic Adhesiolysis
- Estrogen Therapy to Regrow Endometrium
Complications of Amenorrhea
- Infertility (Anovulation,
Ovarian Failure)
- Osteoporosis (Low Estrogen
Levels)
- Endometrial Hyperplasia
(Unopposed Estrogen in PCOS)
- Psychological Impact (Depression, Anxiety, Stress
Keynote Symptoms of Amenorrhea
1.
Absence of menstruation for more
than three months in a previously regular cycle (secondary amenorrhea) or failure to start menstruation by age 16 (primary amenorrhea).
2.
Hormonal imbalances causing
delayed puberty or menstrual suppression.
3.
Associated symptoms like weight
gain, hirsutism, acne (in PCOS cases).
4.
Fatigue, mood swings, and
headache due to hormonal deficiencies.
5. Cyclic pelvic pain without menstrual flow (suggestive of an obstructive cause).
1. Pulsatilla
Indications:
- Suppressed menses due to
emotional stress, cold exposure, or hormonal imbalances.
- Delayed or scanty menses,
often accompanied by mood swings and weepiness.
Keynote Symptoms:
- Irregular, changeable menstrual cycle.
- Suppression of menses due to stress or
grief.
- Feels better in fresh air, worse in
warm rooms.
- Weepy, mild, and affectionate nature.
- Desire for fatty foods but aversion to
warm drinks.
2. Sepia
Indications:
- Amenorrhea due to hormonal
dysfunction, particularly in PCOS cases.
- Menses absent or very light
with bearing-down sensation in the pelvis.
Keynote Symptoms:
- Indifference to family and
relationships.
- Bearing-down sensation in the lower
abdomen.
- Aversion to sex due to hormonal
imbalance.
- Symptoms worsen in cold air, improve
with vigorous exercise.
- Chloasma (brown facial discoloration).
3. Graphites
Indications:
- Scanty or absent menses due
to metabolic disorders like obesity or hypothyroidism.
- Accompanied by constipation,
dry skin, and cold intolerance.
Keynote Symptoms:
- Late, scanty, or suppressed menses
with obesity.
- Dry, rough skin with eczema
tendencies.
- Constipation with hard stools.
- Swelling and tenderness of breasts
before periods.
- Depression, sadness, and low energy
levels.
4. Calcarea Carbonica
Indications:
- Amenorrhea due to delayed
puberty or hypothyroidism.
- Profuse sweating and
sluggish metabolism.
Keynote Symptoms:
- Profuse sweating on the head during
sleep.
- Cold, damp feet with a tendency for
weight gain.
- Easily fatigued, sluggish metabolism.
- Craving for eggs and indigestible
substances.
- Anxiety about health and fear of
losing control.
5. Senecio Aureus
Indications:
- Delayed menses in young
girls with anemia and urinary disturbances.
- Amenorrhea with a sensation
of fullness in the pelvis.
Keynote Symptoms:
- Feeling of fullness in the bladder and
pelvis.
- Amenorrhea with constant urge to
urinate.
- Anemia, weakness, and pale complexion.
- Menstrual suppression after illness.
- Improves urinary flow and normalizes menstrual function.