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Published on: 7/14/2026

What are some possible reasons for not getting my period?

Missing a period, known medically as amenorrhea, can occur for several reasons. The most common causes include:

  • Pregnancy – the leading reason for a missed period in people of reproductive age
  • Hormonal imbalances – often triggered by stress, significant weight loss or gain, or intense exercise
  • Underlying health conditions – such as polycystic ovary syndrome (PCOS), thyroid disorders, or premature ovarian insufficiency
  • Lifestyle factors – including birth control changes, medications, or perimenopause

Because a missed period can signal anything from a temporary hormonal shift to a condition that needs medical attention, identifying the cause matters. The fastest way to narrow down what may be happening is to review your symptoms alongside your medical history. Take a free, instant, online symptom check to get personalized insights and clear guidance on your next steps — no sign-up required.

Reviewed for medical accuracy: 07/14/2026

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Explanation

There are several possible reasons why you might not have your period. First, if you are sexually active, pregnancy is one of the most common reasons to miss a period. If pregnancy is ruled out, hormonal imbalances might be the cause. Your body needs specific hormones to build up and then shed the lining of your uterus, and if these hormones are off balance, your period might stop. Stress and big changes in your weight or exercise habits can disrupt your body's normal cycle because they affect hormone levels. Some health conditions, like thyroid problems, can also lead to missed periods by interfering with hormone signals. Sometimes, the medicines you take, like birth control, can change your periods or even stop them temporarily. In some cases, women experience menstrual suppression—a state where the menstrual bleeding stops for a period of time. If you've missed your period and are not sure why, try our free AI symptom checker to understand what might be causing your symptoms, or check in with a healthcare provider who can help identify the reason and suggest the best ways to keep your cycle healthy.

(References)

  • deProsse CA, Keettel WC. The missed menstrual period. Postgrad Med. 1977 Jan;61(1):251-2, 254, 256. doi: 10.1080/00325481.1977.11714526. PMID: 189296.

  • Attia GM, Alharbi OA, Aljohani RM. The Impact of Irregular Menstruation on Health: A Review of the Literature. Cureus. 2023 Nov 20;15(11):e49146. doi: 10.7759/cureus.49146. PMID: 38130524; PMCID: PMC10733621.

  • Buck E, McNally L, Vadakekut ES, et al. Menstrual Suppression. [Updated 2024 Jun 7]. In: StatPearls [Internet].

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