A Short Menstrual Cycle is when your period comes earlier than day 25, or so. The cycle is counted from the first day of bleeding until you see it again.

Fertility can be affected if your cycle is too short. This is because it can shorten the number of days before Ovulation, when the egg is developing into a Folicle.

You can figure out when ovulation might be using a very rough formula. Ovulation typically occurs 2 weeks before the period comes.

On a 28 day cycle, a woman would ovulate on day 14. That's 14 days before her period. She may have signs of Ovulation starting on day 12 or 13 too.

Changes like Vaginal discharge getting clear and stringy and more abundant. Feeling achy on the sides of the lower abdomen.

This is called the Folicular Phase. A Folicle is the egg you were born with a bubble of fluid around it.

Think of a chicken egg. In fact, imagine breaking open an egg. The clear runny stuff is what a woman's vaginal discharge at the time of Ovulation looks!

Clear, Runny, Muccous-like, stringy...And Hopefully profuse.

A Super Herb I use to regulate/lengthen the cycle is (Chaste Berries)Vitex Agnus Castus. This really reliably will lengthen the average cycle from a few days to a week or more. A Tincture is best. To get solid results, take: 1/2-1 Teaspoon 3X Day ...day in and day out for 1-3 months.

It is the Best Menstrual Regulator that I have solidly used for many years in my practice. Even in cases where the period was coming every 2 weeks it really normalized the situation within 1 to 3 months.

Losing blood too often, through short periods, can be weakening and leave you blood deficient. A period that's too heavy can do this too. Good herbs to stop excess bleeding are Shepherd's Purse(Capsella Bursa Pastoralis), Agrimony, Yarrow, and even Hammamalis for severe Bleeding.