There are developmental windows of readiness for chewing, swallowing, accepting textures and other aspects of feeding. (candokiddo.com)
Studies in animals show that during a brief prenatal developmental window, testosterone and related hormones cause structural changes in the male's brain so that it differs from that of a female's. (discovermagazine.com)
They are concerned that contaminants that mimic hormones can have significant harmful effects at very low doses if exposure occurs during a susceptible developmental window. (scientificamerican.com)