Luteal phase deficiency

Definition

Follicle persistence and luteal insufficiency

• Follicular persistence: no ovulation, estrogen production persists.
• Its typical bleeding pattern: prolonged, acyclic bleeding (metrorrhagia).
• Corpus luteum insufficiency: short/weak luteal phase, premenstrual spotting.
• Its significance for fertility: insufficient luteal phase for implantation.
• Corpus luteum persistence: prolonged luteal phase, late/heavy bleeding.

• Luteal phase deficiency is a clinical diagnosis associated with a shortened luteal phase of 10 days or fewer; alternative definitions use 9 or 11 days.
• Proposed causes are inadequate duration or level of progesterone, or endometrial progesterone resistance.

Occurrence & epidemiology

Epidemiology

• Short luteal phases also occur in women without fertility problems; in one study, 13% of ovulatory cycles were affected.
• It has not been proven to be an independent cause of infertility or recurrent pregnancy loss.

Aetiopathogenesis

Aetiology and pathogenesis

• Associated findings are low follicular-phase FSH and oestradiol levels and abnormal FSH and LH pulsatility.
• Associated conditions include hypothalamic amenorrhoea, eating disorders, excessive exercise, significant weight loss, stress, obesity, polycystic ovary syndrome, endometriosis, ageing, thyroid dysfunction and hyperprolactinaemia.

Clinical features

• Short cycles and premenstrual spotting have been described, as has an association with subfertility and first-trimester pregnancy loss, which remains uncertain.

Diagnosis

• The diagnosis is made clinically; proposed methods are cycle length, basal body temperature charting or urinary LH tests, serum progesterone and endometrial biopsy.
• None of these tests reliably distinguishes fertile from infertile women, partly because progesterone is secreted in pulses and may fluctuate up to eightfold within 90 minutes.

Keep learning in the app

Further reading (selection)

1. ASRM Practice Committee: committee opinion on luteal phase deficiency (2021)
2. ASRM Practice Committee: committee opinion on luteal phase deficiency (Fertil Steril 2026, abstract in Europe PMC)
3. DocCheck Flexikon, Corpus-luteum-Insuffizienz

Cross-references