Answer:

1. The menstrual cycle provides important body chemicals, called hormones, to keep you healthy. It also prepares your body for pregnancy each month. A cycle is counted from the first day of 1 period to the first day of the next period. The average menstrual cycle is 28 days long. Keeping track of your periods can benefit you in a number of ways that range right from helping you to avoid those 'emergency moments' to even taking steps linked to health-related issues.

2.

Missed or late periods happen for many reasons other than pregnancy. Common causes can range from hormonal imbalances to serious medical conditions. There are also two times in a woman's life when it's totally normal for her period to be irregular: when it first begins, and when menopause starts. Missing a period does not cause ovarian cancer. However, there may be a link between missing periods and an increased risk of developing the disease. A 2016 study revealed that women with irregular menstrual cycles may have a higher risk of developing ovarian cancer.