Measuring PdG levels provides insight into successful ovulation, a piece of the fertility puzzle that you can’t get from BBT or blood tests alone. After circulating through the bloodstream, progesterone is released from the body as the urinary marker, Pregnanediol Glucuronide (PdG). Sustained, elevated PdG levels during the second half of your cycle — the “implantation window” — is an indication of successful ovulation, which increases your chances of successful implantation and pregnancy by as much as 75%. Low PdG levels during the second half of your cycle may indicate a problem with ovulation that could make it more difficult to get pregnant.
People who might have a problem with ovulation might benefit from testing for PdG. This includes:
*Amy Beckley, Joshua Klein, John Park, Aimee Eyvazzadeh, Gary Levy, Alexandra Koudele. The predictive value of urinary progesterone metabolite PdG testing in pregnancy outcomes. Obstetrics and Gynecology Research 5 (2022): 194-198.