Low Progesterone in Women: Symptoms, Causes and Treatment

What does progesterone do?

Progesterone is made mainly by the corpus luteum, the temporary gland that forms in the ovary after an egg is released. In a typical cycle, it rises in the second half (the luteal phase) to steady the uterine lining that estrogen has built up. If pregnancy doesn't happen, progesterone falls and a period follows.

That means progesterone depends on ovulation. No ovulation, no luteal progesterone. Most "progesterone deficiency" is really a sign that ovulation is irregular or that the luteal phase is short. Progesterone also acts on the brain, where one of its breakdown products enhances calming GABA signaling, which is part of why it can make some women drowsy.

What are the symptoms of low progesterone?

Cycle changes (the most reliable signs)

• Shorter cycles, for example every 21 to 24 days
• Spotting for several days before your period starts
• Heavier or longer periods, because the lining grows under estrogen without a steady progesterone phase
• Irregular or skipped periods when ovulation becomes less predictable

Other symptoms women often link to low progesterone

• Worse premenstrual mood changes, irritability or anxiety
• Trouble sleeping, especially before a period
• Breast tenderness and bloating
• Night sweats in perimenopause

These symptoms are common and nonspecific. Thyroid disease, fibroids, polyps, anemia, depression, sleep apnea and stress can cause the same things. Lists that attribute weight gain, brain fog or hair loss mainly to low progesterone go beyond the evidence.

Low progesterone vs. low estrogen: how to tell the difference

In perimenopause, both patterns can show up in the same year, even the same month, so treat this as a rough guide rather than a diagnosis.

For the estrogen side, see low estrogen symptoms.

What causes low progesterone?

• Perimenopause. As the egg supply falls, more cycles are anovulatory or have a short luteal phase. In a detailed study of daily urine hormones, cycling women over 47 had lower luteal progesterone than younger women while their overall estrogen output was actually higher (Santoro 1996). This is why perimenopause can feel like "too much estrogen" at times; see estrogen dominance.
• Polycystic ovary syndrome (PCOS), where ovulation is infrequent.
• Thyroid disorders and high prolactin.
• Low energy availability: under-eating, intense training or rapid weight loss can suppress ovulation.
• Significant stress or illness.
• Menopause. After the final period, the ovaries stop ovulating and progesterone stays low. This is normal, not a deficiency to be "corrected" on its own.

"Luteal phase deficiency," a luteal phase of 10 days or fewer, is a recognized clinical description. But the American Society for Reproductive Medicine notes that it also occurs in fertile, normally cycling women, that there is no reliable way to diagnose it, and that it hasn't been proven to cause infertility on its own (ASRM 2026).

How is low progesterone tested?

How is low progesterone treated?

Treatment depends on the problem you're trying to solve, not on a progesterone number.

Heavy or irregular perimenopausal bleeding

Options include cyclic oral progestogens, a levonorgestrel IUD, or hormonal contraception, after other causes have been ruled out. These are prescribed and monitored by a clinician, usually in person.

Perimenopausal night sweats and sleep

Oral micronized progesterone at bedtime has been studied on its own. In a randomized trial of 189 perimenopausal women, 300 mg at bedtime did not significantly improve the main hot flash score versus placebo over 3 months, but women reported fewer night sweats and better sleep (Prior 2023). For more, see progesterone and sleep.

As part of menopausal hormone therapy

Over-the-counter progesterone creams

One small 1999 trial found a progesterone cream improved hot flashes more than placebo, without any bone benefit (Leonetti 1999). But ACOG cites a systematic review of three trials that found the evidence did not support progesterone cream for hot flashes (ACOG 2023). Non-prescription creams aren't regulated as medicines, so their content varies, and they should never be used as uterine protection with estrogen.

Can you raise progesterone naturally?

You can support regular ovulation, which is what produces progesterone: eat enough, especially if you train hard; manage weight if you have PCOS; treat thyroid problems; and protect your sleep. Vitamins such as B6, zinc or magnesium, and herbs like chasteberry, are often marketed for progesterone, but evidence that they raise progesterone in a meaningful way is limited. In perimenopause, no lifestyle change reverses the decline in ovulation.

When should you see a clinician?

• Periods soaking a pad or tampon every hour, lasting more than 7 days, or with large clots
• Bleeding between periods or after sex
• Any bleeding after 12 months without a period
• Cycles shorter than 21 days, or no period for 3 months if you're under 45
• Mood changes that affect daily life, or any thoughts of self-harm

Where Amie fits

If your main problem is hot flashes, night sweats and disrupted sleep around menopause, estrogen therapy with a progestogen is the most effective treatment. Amie's licensed clinicians can review your history and, if appropriate, prescribe Amie HRT+, a compounded cream combining estradiol and progesterone. It is not FDA-approved, and it isn't a treatment for heavy or irregular bleeding, which should be evaluated in person first. FDA-approved estradiol with oral micronized progesterone is a well-studied alternative. See the hormone replacement therapy guide for the full picture.

The bottom line