✔ 最佳答案
Please just get your dog spayed.
In this day and age with the internet at your fingertips then it is almost outrageous that you have not found out anything more about a dogs heat cycle than that.
They do not have a period at all - it is the opposite to a human female.
They come in every 6 to 8 months not every month.
JUST GET HER SPAYED for goodness sake