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My girlfriend is running on 2.5 months without starting her period (says this has never happened) but we have never had intercourse, and she has been on "the pill" for the last 4 or 5 months.  As I've stated, we've never had intercourse, but there HAS been penis->vagina contact in the past, not with semen present, though there may have been minor pre. Just wondering what the chances would be of her being pregnant if we haven't done the dirty and she's been on birth control.  If you don't think she is pregnant, what could be happening?


Depending on her age, health & activity level, there are plenty of reasons why her period may be late.

  1. Stress
    Stress can affect many things in our lives, including our periods. Sometimes we're so stressed out that our body decreases the amount of a hormone (GnRH), which causes us to not ovulate or menstruate. Working with your doctor or midwife can help you figure out what you need to do to relax and get back on schedule.
  2. Illness
    A sudden, short illness or even a longer illness can cause your periods to be delayed. This is usually temporary.
  3. Change in Schedules
    Changing schedules can really throw off your body clock. This is particularly true if you go from days to nights at work or vice versa.
  4. Change in Medications
    Perhaps you're trying a new medication and a delayed or absent period is the cause. Be sure to talk to your doctor or midwife about this side effect. It is very common with some methods of birth control.
  5. Being Overweight
    Carrying around too much weight can hormonally shift your cycles and even stop them. Most women will see a return to normal cycles and fertility with the loss of some weight.
  6. Being Underweight
    If you do not have enough body fat you will not have regular periods, sometimes you can eve cause your periods to stop all together. This is called amenorrhea. Typically a weight gain will help you have your periods return. This is a frequent cause of a missed period in women who work out to an extreme or are professional athletes.
  7. Miscalculation
    The menstrual cycle varies from woman to woman. While we say that the average menstrual cycle is 28 days long, that is not true for everyone. Sometimes our period is believed to be late when in all actuality we have simply miscalculated. If you have irregular menstrual cycles, but know when you ovulate, look for your period about two weeks after you ovulate. That may help you keep an easier track of your periods.
  8. Perimenopause
    Perimenopause is the period of time where you are transitioning from reproductive age to a non-reproductive age. Your periods may be lighter, heavier, more frequent or less frequent - but mostly just not normal. If you do not wish to get pregnant, be sure to continue to use birth control because you are likely to still be fertile at least some of the time.
  9. Menopause
    Menopause is when you have reached the point in your life where you will no longer ovulate or menstruate. Menopause can be a natural life event or may happen surgically through hysterectomy or through chemical such as chemotherapies.