HORMONES
Progesterone
Also known as P4
What it is
Progesterone is a hormone produced by the ovaries after ovulation and by the adrenals. It is central to the menstrual cycle, pregnancy, and menopausal hormone therapy.
Why it matters
Progesterone confirms ovulation, supports pregnancy, and provides endometrial protection when women use estrogen. It also has effects on sleep and mood.
Range GPLX watches for
Progesterone ranges depend heavily on cycle stage, menopausal status, and use of hormone therapy. Your physician interprets progesterone in that context.
This educational range is not a personal diagnostic threshold. Your physician interprets your result in context of your full biomarker panel, medications, symptoms, and history.
What abnormal values can suggest
If low
A low progesterone value can suggest anovulation, luteal phase deficiency, perimenopause, or menopause.
If high
A high progesterone value can suggest pregnancy, luteal phase, exogenous progesterone use, or, rarely, ovarian pathology.
This marker is reviewed when clinically appropriate as part of physician-directed labs. Membership is $39.99/month; consultation is $30.
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