1) Chemical compound 2) Compound 3) Human metabolite 
Pregnanediol is an inactive metabolic product of progesterone. A test can be done to measure the amount of pregnanediol in urine, which offers an indirect way to measure progesterone levels in the body ...
(from the article `hormone`) ...cells. The functions of the two important follicular phases, preceding and following ovulation, therefore, are continuous. The hormone is ...
<chemical> Chemical name: Pregnanediol ... (12 Dec 1998) ... 
(preg″nān-di´ol) a crystalline, biologically inactive end product of progesterone metabolism, found especially in the urine of pregnant women and during the premenstrual and luteal phases of the menstrual cycle.
Type: Term Pronunciation: preg′nān-dī′ol Definitions: 1. Chief steroid metabolite of progesterone that is biologically inactive and occurs as pregnanediol glucuronate in the urine.
[n] - a compound found in women`s urine during certain phases of the menstrual cycle and in the urine of pregnant women
noun a compound found in women`s urine during certain phases of the menstrual cycle and in the urine of pregnant women