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Beaumont Laboratory

Inhibin B


Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Send specimen to the Laboratory for processing immediately after collection. 

Note: Patient Preparation: Twenty-four (24) hours before this test, the patient should not take multivitamins or dietary supplements containing biotin (vitamin B7) which is commonly found in hair, skin and nail supplements and multivitamins.

Physician Office/Drawsite Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transport serum to a plastic transport tube and freeze (-20°C/-4°F or below) immediately.

Preparation for Courier Transport

Transport: 0.5 mL serum, frozen (-20°C/-4°F or below). (Min: 0.2 mL)

Rejection Criteria

  • Hemolyzed specimens.
  • Lipemic specimens.
  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 48 hours
Frozen (-20°C/-4°F or below): 30 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.


Sent to ARUP Laboratories, Salt Lake City, UT.


Wednesday, Friday.
Results available in 2-9 days.

Reference Range

By report.

Test Methodology

Quantitative Enzyme-Linked Immunosorbent Assay.


Indications for testing:

Women aged 35 years or greater, women of any age experiencing unexplained infertility who have a poor response to ovulation induction, women presenting for other tests of ovarian reserve including day 3 FSH and clomiphene challenge test, and women experiencing recurrent pregnancy losses should be tested for day 3 Inhibin B concentrations.

Clinical Utility

This test is for evaluating ovarian function. Inhibin B serum concentration provides a measure of ovarian reserve. Ovarian reserve describes the ovary's capacity to respond to gonadotropin stimulation by producing a sufficient number of good quality eggs capable of generating normal embryos. Inhibin B serum concentrations drawn on cycle day 3 have been shown to predict response of ovaries to gonadotropin stimulation in invitro fertilization (IVF) cycles.

CPT Code


Test Codes


Last Updated


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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.