1.   Biochemists call these pollutants synthetic estrogens.

2.   Although Barnes could conceive, she could not carry a pregnancy due to health problems associated with the synthetic estrogen DES.

3.   Duramed Pharmaceuticals Inc. started over in its battle to win approval for its synthetic estrogen, this time as a new, branded product.

4.   He also thought it might encourage pharmaceutical companies to hone synthetic estrogen to a form that would allow men to gain the benefits without side effects.

5.   He and colleagues were thwarted a few years ago, he said, when they wanted to study the side effects of an older synthetic estrogen replacement.

6.   The Pill used to suppress ovulation through a heavy dose of a synthetic estrogen.

7.   The recommendation concerns steroidal estrogen, a synthetic estrogen long known to raise the risk of endometrial cancer and possibly breast cancer.

8.   The researchers cited environmental rather than genetic factors as the probable cause but carefully noted that it remained to be determined whether synthetic estrogens were responsible.

9.   The ruling effectively froze any efforts to bring a synthetic estrogen to market, and has been the subject of ongoing appeals by Duramed.