Brown blood generally means its old blood, perhaps from an old period such as the one before this.
Its usually nothing to worry about.
Periods can be irregular at times, its pretty natural.
But if your really worried and the problem persists contact your GP to settle any fears.
Menstrual cycle refers to your reproductive cycle, I think you mean menstruation or your period. Menstrual flow can be brown when your period is light, the blood takes time to leave the body so turns brown just like any other blood would as it gets old, and it mixes with discharge.
The brown blood is old blood your system is just cleaning itself out
It is not unusual for menstrual blood to be brown, especially at the beginning or end of menstruation. This is because menstrual fluid contains tissue and other substances besides blood.
It's still just menstrual fluid. This happens a day or so before you really start bleeding, and it tends to be brown at the end of your period. Older blood turns brown. Your period is more than blood. It's totally normal.
The term menstrual cycle refers to your entire reproductive cycle, I think you mean menstruation or your period. Menstrual flow can be brown when it is light as it takes time for the blood to leave the body and it goes brown as it gets old, it also mixes with discharge which changes the colour too.
When you start your period if you have brown, old blood first you count those days as the first day of your 28 day menstrual cycle. You do not have to start counting day one when the blood is red.
This is normal, throughout your teens you can see a lot of irregularity in your menstrual cycles and in your menstrual flow patterns. Brown is just 'old blood' it's light bleeding that's taking time to leave your body as it's so light, thus turning brown before it gets out of your body. Nothing to worry about.
See the related link on what causes brown discharge after period.
Dark, brown menstruation may be a sign that it is 'old' blood. Sometimes blood stays in the uterus for a few days before your period 'starts'...it could be because it is a light flow or that the cervical opening is very narrow making it difficult for the blood to exit. Light flows and dark blood could also occur because of dehydration.
Dark brown period blood usually appears near the end of your period.
No, when counting your menstrual cycle day one is the first day of true bleeding. Brown discharge is spotting, small amouts of blood mixing with discharge as you start to bleed, but you don't count this as day one.
If your period is suddenly dark brown and light, it should not be of any major concern. It is normal for a period to be light or dark brown in color at the beginning or end of a period. Some forms of birth control can also alter the color and flow of your period.