Decreased circulating progesterone

What it means

An reduced concentration of progesterone in the blood.

Progesterone is a steroid hormone secreted by the corpus luteum after ovulation during the second half of the menstrual cycle.

Rare diseases that can present with this1

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category