What will I look like during week 13 of my pregnancy?

By week 13, your uterus has outgrown your pelvis and is starting to move into your abdomen. You're also probably gaining noticeable weight by this point, and this combination probably means you're much more comfortable in maternity clothes than in your regular pre-pregnancy clothes. Even with all these changes, you may not look noticeably pregnant yet. Your waist, thighs, and hips may be getting thicker, and your breasts may also be changing. By now, your breasts probably look noticeably larger, and you may notice changes in skin color around your nipples and in other areas. At this point, stretch marks may begin to form, too.