When during the pregnancy can you start to produce milk?
Women sometimes leak a little clear or white fluid from their nipples from as early as a few weeks into pregnancy. From the start of pregnancy, the breasts are being stimulated with hormones, they start to grow, become sensitive and can even produce a small amount of milk. It's not uncommon for them to leak slightly if you press against them. So don't worry that something is wrong if you experience this.
Hormonal Increases The arrows show the origin of the major pregnancy hormones. Progesterone and estrogen are produced by the ovaries and later by the placenta. Oxytocin and prolactin are produced by the pituitary gland, and thyroxine is controlled by the thyroid gland.