Progesterone is a key reproductive hormone that prepares the uterus for pregnancy and supports early pregnancy. This test helps evaluate ovulation, fertility, and hormonal balance.
Progesterone is a steroid hormone produced primarily by the ovaries after ovulation, with smaller amounts from the adrenal glands. After ovulation, the corpus luteum (remnant of the egg follicle) produces progesterone to prepare the uterine lining for potential pregnancy.
Progesterone levels follow a predictable pattern during the menstrual cycle—low before ovulation, rising sharply after ovulation, then falling if pregnancy doesn't occur (triggering menstruation). During pregnancy, the placenta takes over progesterone production.
This test is commonly used to confirm ovulation, evaluate fertility issues, assess luteal phase adequacy, and monitor early pregnancy or hormone therapy.
Price
$12
Results
2-3 days
Lab Network
Quest
Fasting
Not Required
What's Measured
What This Test Measures
This test measures the concentration of progesterone in your blood, reported in ng/mL. Levels vary dramatically based on menstrual cycle phase, pregnancy status, and menopause.
Who Should Consider This Test
Women trying to conceive (confirms ovulation), those with irregular periods, women with recurrent pregnancy loss, anyone investigating infertility, women using progesterone therapy, and those evaluating hormonal imbalances.
Health Insights
Conditions Screened
Related Symptoms
When to Get Tested
No fasting required. For ovulation confirmation, test approximately 7 days after expected ovulation (day 21 of a 28-day cycle, or 7 days before expected period). For other purposes, timing depends on clinical indication.
Understanding Your Results
Levels vary by cycle phase: Follicular phase (before ovulation): <1.5 ng/mL, Mid-luteal (7 days post-ovulation): 5-20 ng/mL (confirms ovulation), Pregnancy first trimester: 11-44 ng/mL. A mid-luteal level >3 ng/mL suggests ovulation occurred.
What to Expect
After placing your order, you'll receive an email from Rupa Health (our lab order partner) within 24 business hours to sign a consent form and schedule your blood draw at a Quest Diagnostics location.
The blood draw typically takes just a few minutes. Results are usually available within 2-3 business days and will appear in your secure Justlabs dashboard.
Our results include reference ranges and easy-to-understand indicators showing whether your values are within normal limits.
Frequently Asked Questions
$12
Typical hospital cash price: $120–$180
+ $28 in standard lab & physician fees at checkout (no additional bills later)
$18 lab collection + $10 physician order
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