A deep muscular organ in women found in the pelvis between the bladder and the rectum. Its function is to host the embryo and the foetus until birth. It has the shape of a pear, a thick wall and is approximately 75 mm long. It reaches adult size at the age of 15 and reduces in size at menopause. It consists of a main section, a superior section which ends in the Fallopian tubes, and another lower section which opens to the vagina: the neck.