The fetus is about 8mm long and is about the size of a lentil. The fetus has begun to develop the basic characteristics such as ears, nose, mouth, eyes. The fetus has also developed heart that resembles a pipe that beats 100-160 in a minute, thus the heart beat can be detected. Blood cells and blood vessels have started to form along with buds as arms and legs. The brain has started to form into five parts and the pituitary gland has started to form. The spinal cord tube has been shut.