Progesterone

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• The use of hormones, including those containing estrogen or progesterone (such as birth control pills).
• The use of medicines, such as ampicillin and clomiphene.
• The time of day when you have the test. Progesterone levels normally fluctuate during the day.
• Exercise.
• Having a test such as a thyroid scan or bone scan that used a radioactive substance (tracer) within 1 week before the progesterone test.
• Where you are in your menstrual cycle.

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Author:	Maria G. Essig, MS, ELS Carrie Henley	Last Updated: August 7, 2007
Medical Review:	Patrice Burgess, MD - Family Medicine Kirtly Jones, MD - Obstetrics and Gynecology Andrew Swan, MD, CCFP, FCFP - Family Medicine
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