Milk isn't produced until after birth. Colostrum can leak out during pregnancy though. Each pregnancy is diffrent. I didn't leak with my first two but I have with this one. Just depends on the pregnancy.
Well with my first child I had leakage & my breast where really heavy . You could tell they had milk in them . The leakage actually looks like milk .
Sorry if this sounds uninformed (Im 7 wks, first pregnancy), but how do you know that the milk has formed? Is there any leakage?