My Body – Pregnancy Week 12Brought to you by
You may begin to notice some skin changes by week 12, like darker freckles, more freckles, or even a dark line about a centimeter across, that runs vertically down your stomach. This line is called the Linea Nigra (Latin for “black line”).
These changes in pigmentation are caused by pregnancy hormones, which increase the production of the pigment melanin. Women with darker pigmentation are more likely than women with fair skin to develop this line. Among the women who do develop it, it's reported that it usually disappears within just a few months after birth, although sometimes it can last longer.