The mothers with the highest concentrations of BPA were more likely to have girls who were more aggressive and hyperactive at the age of 2 as compared to mothers with lower levels of BPA. One of the researchers commented that “girls whose mothers had higher BPA exposure were more likely to act like boys than girls”.
Ang mga ina na may pinakamataas na concentrations ng BPA ay mas malamang na magkaroon ng batang babae na ay mas agresibo at hyperactive sa edad ng 2 bilang kung ihahambing sa mga ina na may mas mababang antas ng BPA. Isa sa mga mananaliksik commented na "batang babae na ang ina ay nagkaroon ng mas mataas na BPA exposure ay mas malamang na kumilos tulad ng boys kaysa girls".