is this right

Katy • 27, Married, Boy Mom to Thomas John Herron 💕4💕12💕23💕

To figure out how long your cycle is, start at cycle day 1 of your last menstrual cycle and begin counting (Cycle day 1,2,3,4 and so forth). The length= the last cycle day before you started bleeding...tried it but i have no idea if i did it right...