Cycle

Number of days between the first day of a woman's menstruationMenstruationThe loss of blood once a month through a woman's vagina. Menstruation lasts…Read more and the first day of the next period. An average cycleCycleNumber of days between the first day of a woman's menstruation and the first…Read more is about 28 days, but rmany women have a shorter or longer cycle. OvulationOvulationMoment at which a ripe egg cell is released from 1 of the…Read more takes place about 14 days before the start of the next cycle.