11.   They found Gedeon Richter, a Hungarian company, to make a pill consisting solely of a synthetic hormone, a progestin.

12.   Thinking like a parent, I like the idea of feeding my son hamburgers free of synthetic hormones.

13.   Cyclists recently used an undetectable synthetic hormone called EPO which boosts endurance by stimulating the production of oxygen-carrying red blood cells.

14.   EPO is a synthetic hormone that increases the oxygen-carrying red blood cells and is still undetected by conventional drug tests.

15.   EPO is a synthetic hormone that stimulates the production of oxygen-carrying red blood cells and cannot be detected by existing doping tests.

16.   EPO is a synthetic hormone that stimulates the production of oxygen-carrying red blood cells.

17.   EPO is a synthetic hormone that stimulates the production of oxygen-carrying red blood cells and cannot be detected by existing drug tests.

18.   EPO, or erythropoietin, is a synthetic hormone that improves stamima by increasing the level of oxygen-carrying red blood cells.

19.   Erythropoietin, or EPO, a synthetic hormone which boosts the production of oxygen-rich red blood cells, is believed to be particularly popular.

20.   High red blood cell levels indicate the possible use of EPO, a banned synthetic hormone that boosts stamina and endurance.