End product of progesterone metabolism found in urine
Fate of progesterone

Within a few minutes after secretion, almost all the progesterone is degraded to other steroids that have no progesterone effect
The major end product of progesterone degradation is pregnanediol. Approximately 10%  is excreted in urine in this form
Pregnenolone
17-OH Pregnenolone
Pregnanetriol
Pregnanediol