Unless you’re trying for a baby, getting your period regularly is both a blessing and a curse. On the one hand, you have to deal with cramps, bloating, and mood swings. On the other, yay, you’re not pregnant! Suddenly your missed period when babies aren’t on the agenda can be a real freak-out moment, but there are a few other factors that may be to blame.
Here, ob-gyn Alyssa Dweck, M.D., co-author of V is for Vagina, offers potential reasons you have a late period that have nothing to do with a bouncing bundle of joy.
Major Weight Loss or Excessive Exercise “This is a reason I see not that infrequently in my office,” says Dweck. “If your BMI rapidly dips below 18 or 19, you may start to miss periods.” This isn’t strictly based on BMI, though.