Are you counting by the calendar days? Usually the cycle is in sync with the phases of the moon, meaning you will have 13 cycles a year, not once a month which would be 12 cycles.
No real reason. Maybe you miss counted and if you keep a calendar check that . If you are young and just starting a period it will be irregular for a year or so.
Because your menstrual cycle follows your bodies clock, not the calender.
No
a menstrual cycle (more comonly known as a period) lasts about a week and happens once a month.
When you get your period depends on your menstrual cycle. If you have a 28 day menstrual cycle you will likely get your period once per month, where as if you have a 20 day cycle it is possible to have two periods in one month - e.g. you could get your epriod on the 1st of the month, then again on the 20th of the month.
A woman has her menstrual flow during menstruation, which is at the start of her menstrual cycle. The typical menstrual cycle is around 28 days, meaning she should menstruate roughly every month.
Orientation has nothing to do with menstrual cycle.
Yes, your period isn't determined by the calendar date but is determined by your menstrual cycle - if your menstrual cycle was only 21 days long then you could menstruate on the first of the month, then again on the twentyfirst of the month.
It is possible for a female to go through their menstrual cycle twice in one month. There are many factors that can contribute to this. Hormones and stress levels are large factors in relation to the menstrual cycle.
A lunar month is 28 days... important for the menstrual cycle and such.
No, months have no effect on your menstrual cycles.
If that happens often you should go to a doctor for a checkup.
Your period doesn't start on a specific calendar date, calendars are man-made and your menstrual cycle is controlled by nature/biology. When you menstruate is determined by your menstrual cycle, the typical cycle is 28 days but everyone is different and up to a weeks variation from your average menstrual cycle is normal - it's not possible for your periods to start the same day of the month every month.
The average menstrual cycle length is 28 days, which is around a month long. A menstrual cycle is around this length simply because this is how long it takes for your body to ovulate and in turn for it to menstruate.