Can a mild case of the whooping cough cause a late menstrual period?

Ppssibly. Illness : Can be a reason. Reasons for missed/late periods: low body wt, obesity, marked wt ^ or v, over-exercise, prgancy, endurance athletics, breast-feeding, ^ stress, illness, eating disorders (bulimia or anorexia), anovulatory cycle (no egg released), travel, hormone irregularities, drug use, meds (i.e., birth control) or medical problems (polycystic ovary syndrome or asherman’s syndrome).