A healthy result should fall into the range 6 - 20 ng/mL.

Although progesterone is found in both males and females, it is primarily known for its role in conception, pregnancy, and the regulation of a woman’s menstrual cycle. Produced in the ovaries, adrenal glands, and the placenta of pregnant women, progesterone has several functions in addition to its role as a sex hormone. It supports bone density, protects against the proliferation of breast and uterine cells, and acts as a coating for the nerve fibers of the brain, reducing hyperexcitability. A female’s progesterone levels rise and fall according to the stages of her life. While men also synthesize a small amount of this hormone, it is much less important than testosterone when it comes to sexual maturity. Synthetic forms of progesterone (progestins) are widely used in birth control pills and hormone replacement therapy.

Natural progesterone levels are suppressed in women who take synthetic forms, so blood tests are inaccurate in these case. Otherwise, a blood test is usually administered twenty-one days after the start of a woman’s period, if she is still menstruating. Because progesterone readings normally fluctuate in women, there are a number of normal ranges for this hormone, as shown here:





  Follicular phase 0.2-1.4 0.64 – 4.45
  Luteal phase 4 – 25 12.7 – 79.5
  Post-Menopausal 0.1 – 1 0.32 – 3.18
Males 0.1 – 1 0.32 – 3.18

Conversion factor: 1 ng/ml = 3.18 nmol/l


While variations in progesterone levels may be perfectly normal, sometimes a high reading is cause for further testing.

Progesterone result calculator

insert the value from you Progesterone test result.

What does it mean if your Progesterone result is too low?

Causes of decreased Progesterone levels in women:

- Peri-menopause (= the time during which your body makes the natural transition to menopause, marking the end of the reproductive years.

- Menopause

- Amenorrhea (= the absence of menstruation — one or more missed menstrual periods.)

- Anovulation (=when the ovaries do not release an oocyte during a menstrual cycle.)

What does it mean if your Progesterone result is too high?

Causes of increased Progesterone levels in women:

- Progesterone supplementation

- Pregnancy

- Diffuse thecal luteinization

- Luteinized granulosa

- Theca-cell tumors

- Metastatic ovarian cancer

- High dose pregnenalone supplementation

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