Missed periods · Irregular cycles · Hormonal evaluation
Missed or irregular periods, explained.
A regular cycle is a sign that the brain, pituitary, ovaries and thyroid are working together. When periods stop for three months or more, or arrive fewer than nine times a year, something in that system has shifted. The cause ranges from PCOS and stress to thyroid, prolactin and pituitary problems, and it is nearly always identifiable. Dr. Hasan is experienced in evaluating amenorrhea and irregular cycles in women from the teenage years through perimenopause.
Where cycles go wrong
Primary amenorrhea means no period by age 15; secondary amenorrhea means periods that have stopped after previously being regular. After pregnancy is excluded, the evaluation asks where the signal is failing.
Thyroid disease and high prolactin disturb the axis at the top and are checked in everyone.
Reading the clues
Clues that point to the cause
- 1Headaches or vision change: pituitary tumor. Stress, restrictive eating, heavy exercise: hypothalamic amenorrhea
- 2Milky nipple discharge: high prolactin
- 3Acne and excess facial hair: PCOS or other androgen excess
- 4Thyroid over- or under-activity
- 5Hot flashes, night sweats, vaginal dryness: low estrogen (ovarian insufficiency or perimenopause)
- 6Weight gain and insulin resistance (PCOS) or significant weight loss (hypothalamic)
- 7Stress fractures and bone loss after months without estrogen
FSH high with low estradiol points to the ovaries; FSH low or normal with low estradiol points to the brain or pituitary.
Treatment depends on the cause
- PCOS: lifestyle and insulin-sensitizing treatment, cyclic progesterone or a combined pill to protect the uterine lining, and ovulation induction when pregnancy is the goal.
- Hypothalamic amenorrhea: restoring energy balance, adjusting training load and addressing stress, with nutrition and, when helpful, psychology support. Periods usually return within 6 to 12 months; bone protection is addressed meanwhile.
- High prolactin: cabergoline or treating the medication or thyroid cause; cycles return within months.
- Thyroid disease: correcting hypo- or hyperthyroidism alone often restores regular cycles.
- Primary ovarian insufficiency (menopause before 40): hormone replacement until the usual age of menopause to protect bone, heart and brain, plus fertility counseling and genetic or autoimmune screening.
- Perimenopause: symptom-directed treatment and contraception planning as cycles wind down.
Dr. Hasan is experienced in evaluating primary and secondary amenorrhea, PCOS, hypothalamic amenorrhea in athletes, high prolactin, primary ovarian insufficiency and thyroid-related cycle problems, in coordination with gynecology and fertility specialists.
Common questions
I am an athlete and my periods stopped. Is that normal?
It is common but not healthy. Loss of periods from training and under-fueling (relative energy deficiency in sport) lowers estrogen, weakens bone and raises stress-fracture risk. It is reversible with changes to energy intake and training.
Does the pill fix amenorrhea?
It produces a withdrawal bleed but does not treat the cause. It is useful for lining protection in PCOS and for contraception, but the underlying problem still needs a diagnosis.
Can I still get pregnant?
In most causes, yes, once the cause is treated. Even primary ovarian insufficiency allows spontaneous ovulation in 5 to 10 percent of women, and fertility options exist for the rest.
How long should I wait before being evaluated?
Three months without a period, or persistently irregular cycles for six months, warrants evaluation. Earlier if there are headaches, vision changes, nipple discharge, rapid hair growth or hot flashes.
Related conditions
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