Mid-luteal progesterone

A raised progesterone level roughly a week after ovulation confirms that an egg was released. In an irregular cycle the test must be timed to the individual cycle, not automatically to day 21. A low result usually means the test was mistimed rather than that ovulation failed.

Also known as: day 21 progesterone, progesterone test, ovulation blood test

Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.