Progesterone Levels during Pregnancy

Progesterone, a hormone produced by the ovaries and by placenta, has an important role throughout the menstrual cycle and pregnancy. Progesterone tests are usually taken:

  • to detect whether or not a woman has ovulated,
  • to determine the date of ovulation,
  • to monitor pregnancy.

What are normal progesterone levels?

Progesterone levels widely vary throughout the menstrual cycle. That is why it is important to know the first day of your last menstrual period.

Menstrual cycle

Follicular Phase      0,35 - 0,65 ng/mL

Ovulation      0,5 - 10 ng/mL

Luteal Phase      6,5 - 60 ng/mL


First Trimester      8,5 - 47,4 ng/mL

Second Trimester      16,5 - 147,1 ng/mL

Third Trimester      48,5 - 235,5 ng/mL

Postmenopausal:      <0.64 ng/mL

Progesterone in men:      3.2 ng/mL


Progesterone tests are usually taken during pregnancy, as low progesterone levels may indicate a threatened miscariage. The level of 10ng/mL is considered to be the minimum for healthy pregnancy during the first few weeks. If the level is lower than 10 ng/mL, doctors usually prescribe progesterone supplements to help to maintain pregnancy.

Progesterone supplements are also used if a woman has problems with ovulation.

Progesterone levels are higher when carring twins or triplets.

High levels of progesterone in pregnant woman may be caused by molar pregnancy.

In non-pregnant women high levels of progesterone may indicate the cancer of the ovaries or adrenal glands.


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