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What is a PDG test?

Published in Ovulation Testing 2 mins read

A PDG test helps women confirm ovulation and adequate progesterone levels.

PDG tests offer valuable insights into a woman's ovulation and progesterone levels, which are crucial for both achieving and avoiding pregnancy. Here's a detailed look:

Understanding PDG Tests

  • What it measures: PDG tests measure pregnanediol glucuronide (PdG), a urine metabolite of progesterone. Progesterone is a hormone that rises after ovulation and is essential for maintaining a healthy uterine lining for implantation.
  • Purpose: These tests serve two primary purposes:
    • Confirming Ovulation: They provide evidence that ovulation has occurred.
    • Assessing Luteal Phase Adequacy: They help determine if progesterone levels are sufficient and if the luteal phase (the time between ovulation and menstruation) is long enough to support a potential pregnancy.
  • For Women Trying to Conceive: Adequate progesterone levels and a sufficient luteal phase are crucial for implantation and maintaining a pregnancy. A PDG test can help identify potential issues that might hinder conception.
  • For Women Using Fertility Awareness-Based Methods (FABMs): PDG tests can act as a double-check to confirm the end of the fertile window for women using FABMs to avoid pregnancy, according to provided reference from 02-Jul-2019.

Benefits of PDG Testing

Benefit Description
Confirmation of Ovulation Provides concrete evidence that ovulation has taken place.
Assessment of Progesterone Indicates whether progesterone levels are adequate to support a healthy uterine lining.
Luteal Phase Length Helps determine if the luteal phase is long enough to support a potential pregnancy.
Double-Check for FABM Users Offers an additional layer of confirmation for women using fertility awareness-based methods (FABMs) to prevent pregnancy.
Convenient Testing Usually conducted at home using urine samples.

Limitations

PDG tests, while useful, have some limitations:

  • Not a Direct Measure of Progesterone in Blood: PDG is a metabolite, so the tests are not direct measurement of progesterone levels in blood.