MODEL RELEASED. Pregnant woman (image 3 of 6). View of a 33 year old woman in the middle stage of pregnancy, the second trimester. She is 15 weeks pregnant. Her uterus has begun to grow rapidly in size, while her nipples enlarge and darken. Her appetite has also increased dramatically leading to large weight gains. At this time her foetus is only around 14 centimetres in length from crown to rump. This is part of a sequence including images M805/481 and M805/483-487.