Various things can happen to cause bleeding outside of the menstrual cycle. For example, it is possible for sex to cause bleeding.
The menstrual cycle starts with menstruation. The firswt day of your menstrual cycle is considered to be the first day of true bleeding during your menstrual phase.
The contraceptive implant prevents the normal menstrual cycle. Some women have irregular bleeding, and others have no bleeding at all.
If you're asking if its normal to have a 7 day menstrual cycle the answer is yes.
When you become pregnant, your menstrual cycle is delayed for next ten periods. That means you will not get menstrual bleeding till delivery.
You don't have a normal "menstrual cycle" when on Mirena, although you may have vaginal bleeding. Pregnancy with Mirena is unlikely whether or not you are bleeding.
Menopause is the ending of the menstrual/ fertility cycle in women, there is NO bleeding.
Metrorrhagia or intermenstrual bleeding.
Endometrial bleeding occurs during the menstrual cycle. The endometrium is reabsorbed by the uterus during the estrous cycle.
You begin spotting and/or bleeding from your vagina.