Progesterone
Progesterone is a hormone produced mainly by the ovaries after ovulation and by the placenta during pregnancy. It prepares the uterine lining for implantation and helps maintain early pregnancy.
Category: Hormones
Also known as: progesterone, p4, serum progesterone, progesteron
Reference range: 0.2–1.4 ng/mL (Source: ABIM)
Standard unit: ng/mL
High values may indicate
High progesterone levels may indicate pregnancy, ovarian cysts, adrenal disorders, or congenital adrenal hyperplasia. Certain forms of ovarian cancer can also produce excess progesterone.
Low values may indicate
Low progesterone levels may indicate anovulation (failure to ovulate), luteal phase defect, ectopic pregnancy, threatened miscarriage, or ovarian dysfunction.
Frequently asked questions
- What is a normal Progesterone level?
- A typical reference range for Progesterone is 0.2–1.4 ng/mL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Progesterone measured in?
- Progesterone is most commonly reported in ng/mL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Progesterone reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Progesterone over time?
- Yes. Upload results from any lab and BloodId charts your Progesterone over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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