104584
For example , the synthetic estrogen in human contraceptives , 17-R - ethinylestradiol , has been shown to increase the feminization of fish downstream from sewage treatment plants , thereby unbalancing reproduction and creating an additional selective pressure on fish survival .
 feminization
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 feminization