Pacific · Progesterone Level Lab Test (Blood)
Progesterone Level Lab Test (Blood) in California
This page explains the progesterone level lab test (blood), what it measures, and how to order it. A progesterone level blood test measures the amount of this key hormone in your bloodstream, helping to evaluate menstrual cycle phases and fertility.
Lab requirements in California
Here is what you need before ordering and completing the Progesterone Level Lab Test (Blood) in CA. Review each item and confirm the details with the collection lab.
- Physician's order
- Included. A physician's order is required for lab testing and is provided for you by our partner's physicians — no referral from your own doctor is needed.
- Fasting
- Some tests require fasting or avoiding certain foods or drinks beforehand. You will be informed when you order — confirm the details with the collection lab.
- Preparation
- Your healthcare provider or the collection lab will give you specific instructions, which may include timing the test to a particular day of your menstrual cycle. Always follow the lab's…
- Sample & visit
- A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
- Identification
- Bring the lab requisition form from your account. The collection lab may also ask for a government-issued photo ID.
- Turnaround
- 1-3 business days
- Availability
- Our partner lab does not serve ND, RI, NY, NJ, MD or HI. Confirm availability for your location with the collection lab.
Before you go
- Order your test before visiting a lab, then use the requisition form in your account.
- Print the requisition form, or fax it to the lab directly from your account.
- No scheduling is needed — visit the collection lab during its normal business hours.
- A blood and/or urine sample is collected; the visit usually takes about 10 minutes.
- Bring a government-issued photo ID in case the lab requests it.
- Results are posted to your secure account within 1–3 business days.
Requirements are summarized from our partner lab's published policies. Preparation and availability can change — confirm current instructions with the collection lab before your visit.
What this test is
This test quantifies progesterone, a hormone produced mainly by the ovaries after ovulation and by the placenta during pregnancy. It is used to assess whether ovulation has occurred, monitor fertility treatments, and evaluate early pregnancy.
What it measures
- Progesterone — reflects ovarian function and ovulation
What the test involves
A healthcare professional collects a small sample of blood from a vein in your arm using a standard blood draw. The sample is then sent to a laboratory for analysis.
Why it is often ordered
A clinician may order this test to determine if ovulation is occurring, to investigate irregular menstrual cycles, or to monitor the effectiveness of fertility medications. It can also be used to check progesterone levels during early pregnancy or in women receiving hormone therapy.
Preparation
Your healthcare provider or the collection lab will give you specific instructions, which may include timing the test to a particular day of your menstrual cycle. Always follow the lab's instructions exactly.
How results are reported
Results are typically reported as a numerical value in nanograms per milliliter (ng/mL) or nanomoles per liter (nmol/L), along with a reference range. Reference ranges vary by laboratory and by the phase of your cycle, so your results should be interpreted by your healthcare provider.
Before you go
- The specific day of your menstrual cycle to schedule the test
- Any medications or supplements you are taking that might affect results
- Whether fasting or other preparation is required by the lab
Cities
Progesterone Level Lab Test (Blood) in California communities
Choose your city for local context and to order this test.