The uterus is the primary female reproductive organ. It is situated within the pelvis and measures approximately 8 cm in length, 4 cm in width and 5 cm in depth in the normal, non-pregnant state. Though relatively quiescent in pre-pubertal and post-menopausal years, the uterus possesses a variety of functions during a woman’s reproductive years. It responds to the production of female hormones, creating changes to allow for implantation of a fertilised egg, or menstruation when pregnancy does not occur. It is also able to rapidly expand with the development of a pregnancy and has a contractile function for labour and delivery during childbirth .
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