There seems to be two disconnected claims (1) whether or not babies can addicted to the nutrients they're exposed to, like an excess of fats., and (2) whether or not a fetus can taste things the mother eats.
A fetus connects the mother's placenta (which only passes nutrients) to the abdomen which is downstream of the mouth where the taste buds are located. It would seem like this is impossible, but at least a few sites seem to have an explanation of it, like babycenter.com
Amniotic fluid surrounds your baby in utero. He naturally breathes and swallows this fluid, which helps with the development of his lungs and digestive system. The flavors of the food you eat and what you drink pass through your bloodstream and into the amniotic fluid.
Is there evidence of this? Does your food flavor the amniotic fluid which a fetus can taste, and if so is it correct to say that fetus can taste the mother's food?