Your period dates change monthly due to normal hormonal fluctuations, especially in teens and during perimenopause, but also from stress, significant weight changes, intense exercise, certain medications, and health conditions like PCOS or thyroid issues, all impacting hormone regulation and cycle consistency. While slight variations are common, consistently changing dates can signal an underlying factor needing medical attention, so see a doctor if concerned, especially with heavy bleeding or missed periods.
Your period usually occurs every 28 days, but normal menstrual cycles can range from 21 days to 35 days. In fact, the average cycle length is 29 days. Many things cause irregular periods (or irregular menstruation) such as changes in hormone levels, stress, certain health conditions, medications and more.
according to google : To turn off cycle predictions on the Flo app, go to your profile settings, then navigate to ``Cycle Prediction'' and toggle the option to ``Off.''. This will prevent the app from displaying your predicted fertile window, ovulation day, and upcoming period dates on the calendar.
I have irregular periods. Can I still get pregnant if I don't get my period all the time? Yes! Any time you have unprotected sex, you could get pregnant.
Changes in your periods
Bleeding between periods, bleeding after having sex, or bleeding after the menopause needs to be checked by a doctor. It might be caused by an infection, abnormalities in the neck of the womb (the cervix) or, in rare cases, it could be cancer.
Here are 9 signs your hormones may be out of whack:
No one is perfectly “regular”
A period that lands on the exact same day each month is not the norm. In the years after you start menstruating, as you approach menopause, when you're pregnant, or when you're adjusting to a new contraceptive method, your cycle will naturally change (1-3).
Irregular Periods: Inconsistent cycles, absent periods, or very light/heavy bleeding may indicate hormonal issues affecting egg health. Low AMH Levels: While Anti-Mullerian Hormone (AMH) indicates egg quantity, it often correlates with declining egg quality.
The most common reasons are:
If you're confused about why your period cycle has changed from 28 days to 31 days, don't worry – it's actually relatively common for women of all ages. It can be caused by a variety of factors such as stress, hormonal changes, or even lifestyle changes like dietary shifts and exercise routines.
Menstrual cycles started out relatively long, around 30 days for younger people under 19 years old. They tended to shorten among people in older age groups, to an average of 28 days for those in their late 40s; but then became longer again after age 50.
In some cases, shorter periods can signal: Poor egg quality (diminished ovarian reserve) – As women age, egg quantity and quality naturally decline, which can shorten cycle length and reduce fertility. Hormone imbalances affect ovulation.
We recommend chelated magnesium, such as magnesium glycinate. It's well known that good vitamin D status is critical for bone health, which becomes critical in perimenopause and menopause. However, vitamin D is also involved in immunity, blood sugar regulation, and genetic expression.
The slightest change in your reproductive hormone levels and physical well-being can mean you have two periods in one month, none at all, or more cycle changes going forward. Most of the time, this is nothing to worry about, but it's worth speaking to your health care professional to put your mind at ease.
In addition, talk with your health care provider if: Your periods suddenly stop for more than 90 days — and you're not pregnant. Your periods become irregular after having been regular. You bleed for more than seven days.
Common symptoms of the menopause include:
Too much or too little thyroid hormone can make your periods very light, heavy, or irregular. Thyroid disease also can cause your periods to stop for several months or longer, a condition called amenorrhea. If your body's immune system causes thyroid disease, other glands, including your ovaries, may be involved.