Quick answer: Progesterone is made mainly after ovulation and helps balance estrogen, supports a healthy luteal phase and early pregnancy, and has calming effects on sleep and mood. Low progesterone can show up as PMS, short or irregular cycles, spotting or trouble conceiving, and it falls in perimenopause. It is usually tested about seven days after ovulation.
What is Progesterone?
Progesterone is a steroid hormone made by the ovaries after ovulation (by the corpus luteum), and by the placenta during pregnancy. Smaller amounts come from the adrenal glands. This marker is part of the Healthspan Assessment panel available to my 1-on-1 patients.
Why Progesterone matters
- Prepares the uterine lining and supports early pregnancy
- Balances the effects of estrogen
- Calming effect on the brain and sleep
- Supports bone and breast health
Understanding your result
Reference ranges vary by lab, age and sex. Your provider interprets your result against the lab’s range and your overall picture, rather than chasing a single number. Functional labs are optional. They can be helpful in more complex cases, and in my practice they are available only to patients working 1-on-1 with me.
What low Progesterone can mean
- No ovulation (anovulatory cycles), including in PCOS
- Perimenopause
- High stress, under-eating or over-exercise
- Thyroid problems or high prolactin
What high Progesterone can mean
- After ovulation and in pregnancy (normal)
- Progesterone medications or creams
What affects Progesterone
- Cycle day and ovulation
- Stress and energy availability
- Thyroid and prolactin
- Age
Ways to support healthy levels
- Eat enough and manage stress to support ovulation
- Support thyroid health (see TSH)
- Track cycles to time testing (see estradiol)
- Discuss progesterone therapy with your provider if appropriate
Progesterone and healthy aging
Progesterone helps calm inflammation and supports sleep and bone renewal. Its decline in perimenopause is often the first hormonal change women notice.
When to see a naturopathic doctor
- PMS, short cycles or spotting before periods
- Trouble conceiving or pregnancy loss
- Poor sleep or anxiety before periods
- Perimenopause symptoms
See a medical provider promptly for heavy bleeding, bleeding in pregnancy, or severe pelvic pain.
Want help making sense of your labs?
A free 15-minute consultation with Dr. Kneessi. No cost, no obligation. In-office in Odenton, MD or by telehealth.
Frequently asked questions
When should progesterone be tested?
About seven days after ovulation, often around day 21 of a 28-day cycle.
What does low progesterone mean?
It may mean ovulation did not occur or the luteal phase is short.
Can stress lower progesterone?
Chronic stress and under-eating can disrupt ovulation and lower progesterone.
Is progesterone cream effective?
Absorption varies. Discuss options with your provider.
Sources
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
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