Progesterone receptor signalling
Biomarker library
Hormonal Health
Progesterone
Progesterone prepares the lining of the womb for a pregnancy. It is made mainly after ovulation, by the follicle that released the egg.
Measured in your health assessment, with a doctor to explain your result. Book yours
Why it matters
A rise in the second half of the cycle confirms that ovulation has happened, which is why it is usually measured about a week before an expected period: day 21 of a 28-day cycle.
What a result can mean
Lower than the range
A low level in the second half of the cycle suggests ovulation didn't happen, which can occur with polycystic ovary syndrome, stress, weight changes, around the menopause or with hormonal contraception. In the first half of the cycle a low level is normal.
Higher than the range
High levels are expected after ovulation and in pregnancy.
What can help
Results are read against the day of your cycle. A healthy weight and managing conditions such as PCOS support regular ovulation, and fertility clinics can help when ovulation isn't happening.
Read it with
NoteGeneral educational illustration. Colours, sizes and movement are simplified. This is not a scan or a simulation of your body. General information, not personal medical advice: a doctor reads your own results with your history.
Know your progesterone.
Measured in your health assessment and explained by the doctor who reviews your results.