Can you please describe common things other than pregnancy that make your period late?

See below: Many things can delay a period exercise is a known factor as is stress some medications taht cause an increase in estrogen may also cause a delay.

Late period: Reasons for missed /late periods: low body weight, obesity, marked weight gain or loss, over-exercise such as in endurance athletes, breast-feeding, stress, illness, eating disorders (bulimia or anorexia), travel, hormone irregularities, drug use, medications (i.e., birth control) or med problem (polycystic ovary syndrome or Asherman’s syndrome. #1 reason is pregnancy.