Each cycle<span> can be divided into </span>three phases<span> based on events in the ovary (ovarian </span>cycle<span>) or in the uterus (uterine </span>cycle<span>). The ovarian </span>cycle<span>consists of the follicular </span>phase<span>, ovulation, and luteal </span>phase<span> whereas the uterine </span>cycle<span> is divided into </span>menstruation<span>, proliferative </span>phase<span>, and secretory </span>phase<span>.</span>
