A pregnant woman's body, however, is full of hormones and vast fluctuations in their levels. This, too, is normal. It rather harkens back to some Victorian Age notions that women who breastfeed also become less intelligent, and that an educated woman will become sterile.
Males also have estrogen, naturally, just as females produce testosterone.
So in answer, there is NO reason to 'fear' for your son. He will continue to be a thriving producer of testosterone, a lover a football and fast cars, and many other stereo-typically 'masculine' things if you're not careful.