--- title: "Missed period and not pregnant: 10 possible causes" description: "Your period is missing but the test is negative. From stress and weight change to PCOS, thyroid issues and contraception: the most common causes and when to see a doctor." url: https://myperiod.app/en/blog/menstruatie-blijft-weg-oorzaken lang: en date: 2026-07-26 publisher: PERIOD. B.V., Amsterdam --- [Back to blog](https://myperiod.app/blog) [Symptoms](https://myperiod.app/blog/categorie/symptomen) · 7 min read # Missed period and not pregnant: 10 possible causes [Lees dit artikel in het Nederlands](https://myperiod.app/blog/menstruatie-blijft-weg-oorzaken) PERIOD. team · July 26, 2026 **Short answer:** a missing period when you're not pregnant is called secondary amenorrhoea. Doctors use that term after three months without a period (or six months if your cycle was always irregular). The most common causes are stress, weight or training changes, PCOS, thyroid problems, hormonal contraception and perimenopause. One skipped cycle is usually harmless, your body isn't a clock. Persistently missing periods are worth taking seriously, even without a wish to conceive: prolonged low oestrogen isn't good for bone and heart health. ## 1. Pregnancy (rule it out) The most common cause, and a test can be taken too early. Repeat after a week if unsure. See [can you bleed while pregnant?](https://myperiod.app/blog/zwanger-worden-tijdens-menstruatie) ## 2. Stress Sustained stress suppresses the hypothalamic signal that drives ovulation. No ovulation usually means no period. Read [cortisol, stress and your cycle](https://myperiod.app/blog/cortisol-stress-en-je-cyclus). ## 3. Low energy availability Rapid weight loss, strict dieting, an eating disorder or heavy training without eating enough can pause your cycle. In athletes this is called RED-S. Common, treatable, and worth addressing. ## 4. Significant weight gain A substantially higher weight can also disturb hormone balance and make ovulation irregular. ## 5. PCOS Polycystic ovary syndrome is a leading cause of absent or very irregular cycles, often alongside acne, excess hair growth or difficulty losing weight. Read [PCOS explained](https://myperiod.app/blog/pcos-uitleg-symptomen). ## 6. Thyroid Both an underactive and overactive thyroid disrupt cycles. A simple TSH blood test clarifies this. ## 7. Raised prolactin Excess prolactin can suppress ovulation. Signs: milky nipple discharge without breastfeeding, headaches or vision changes. Always worth investigating. ## 8. Contraception With a hormonal IUD, injection, implant or continuous pill use, absent bleeding is often normal. After stopping the pill your cycle usually returns within a few months; longer than three months warrants a check. Read [coming off the pill](https://myperiod.app/blog/stoppen-met-de-pil-cyclus). ## 9. Breastfeeding and postpartum Exclusive breastfeeding often suppresses cycles for months. See [your cycle after birth](https://myperiod.app/blog/cyclus-na-bevalling). ## 10. Perimenopause or POI From your late 30s and 40s cycles get more erratic. Periods stopping before 40 may indicate primary ovarian insufficiency, which should be investigated. Read [perimenopause in your 30s](https://myperiod.app/blog/perimenopauze-in-je-30s). ## When to see a doctor - Three months without a period and no clear explanation - You've never had a period and you're 15 or older - Milky nipple discharge, headaches or vision changes - Hot flushes, night sweats or vaginal dryness under 40 - Marked excess hair growth, acne or rapid weight change - You're trying to conceive Bring your cycle data. An overview of your last six to twelve cycles, symptoms included, makes the conversation concrete. *General information, not medical advice.* ## FAQ ### How long can a period be late? A single skipped cycle is common. After three months without one, get it checked. ### Can stress really delay a period? Yes. Stress can delay or block ovulation, so your period arrives late or not at all. ### Does no period mean I'm not fertile? Not necessarily. Ovulation can return before your first bleed, so pregnancy is possible without contraception. [PERIOD. on the App Store](https://apps.apple.com/us/app/period-cycle-period-tracker/id6757947793) · [Google Play](https://play.google.com/store/apps/details?id=app.myperiod.android). Want to understand your cycle better? ## Keep reading [Heavy periods and iron deficiency: when is bleeding too much?How much blood do you normally lose during your period, when is it 'heavy', and why do heavy periods so often cause iron deficiency? With concrete warning signs and what to do.Read more](https://myperiod.app/en/blog/zware-menstruatie-en-ijzertekort)[The real reason behind your bad skin, energy dips and fluctuating libidoSpending hundreds on skincare without results? Discover how your menstrual cycle affects your skin, energy levels, and libido.Read more](https://myperiod.app/en/blog/de-ware-reden-achter-je-slechte-huid-energie-dips-en-wisselend-libido)[Recognizing PMS symptoms: 12 things that aren't a coincidenceCrying at commercials, suddenly craving chocolate, getting irritated over nothing, if it happens 7-10 days before your period, it's probably PMS.Read more](https://myperiod.app/en/blog/pms-symptomen-herkennen)