Menstrual cycle
The menstrual cycle is the period from the start of one menstruation to the start of the next menstruation. This lasts on average 30 days. Part of the menstrual cycle is ovulation.
More about the fertility cycle
The menstrual cycle is the period from the start of one menstruation to the start of the next menstruation. This lasts on average 30 days. Part of the menstrual cycle is ovulation.
More about the fertility cycle