Why My Periods are Late?-Nine Major Reasons.

During your usual morning routine, you open your cabinet, spot a box of tampons in the back, and you suddenly realize you’re late. “When was my last period?” you think as you try to remember the last time you needed to reach for that box. The Panic takes over as your mind thinks straight to pregnancy. Pregnancy is a possible reason for “Why my periods are late”, there might be other factors related to your health or lifestyle that are causing the delay.

The main reason behind missed periods can be an imbalance in your body.

Why My periods are late? –Nine Major Reasons.


Your period may not appear after your baby is born, but don’t be alarmed! If you are breastfeeding your little one, A Late periods are completely normal. Referred to as lactational amenorrhea, In this phase rhythm of your menstrual cycle gets disrupted. In a few months, your menstrual cycle should be right back on track.

Late periods - Breastfeeding

High-Intensity Exercises

Working exercise into your schedule on a daily basis is great, but excessive exercising could lead to lower levels of estrogen, which is the hormone that regulates the female reproductive process. Many athletes experience secondary amenorrhea, meaning they don’t have a period for six months or longer, from rigorous training.

Lady performing leg press

Weight loss or weight gain

Whether you’re overweight or underweight, any change in pounds can affect your monthly cycle. Common health problems linked to weight and irregular menstruation include eating disorders, such as anorexia and bulimia, and uncontrolled diabetes. If you suspect this might be an issue for you, see your health care provider right away.

Lady with tape on the waist


A little bit of stress is fine in everyone’s life, but chronic stress can imbalance so many of your body functions. Stress activates the hormone cortisol and pushes your body into survival mode. If you experience prolonged stress in your life, your body can induce amenorrhea and that will prevent your periods.

woman wearing a black dress

Sleep schedule changes

A long traveling or switching suddenly to night shift may prevent your menstrual cycle from starting.
According to a study published in Frontiers in Endocrinology, any disruptions to your circadian rhythm—the internal clock that regulates important cellular processes—can cause you to experience irregular periods.

Woman sleeping on mattress


If you’re taking a new medication, one of its side effects may be irregular periods. A study on the effect of antipsychotics on menstruation found that amenorrhea occurred because prolactin levels were imbalanced. Birth control medications(such as an IUD, implant, or shot) can also cease your periods.

Late periods- Medicines

Thyroid dysfunction

Issues with your thyroid, such as hypothyroidism and hyperthyroidism, can disturb your menstrual cycle. The thyroid produces hormones that help regulate the body’s processes, and if thrown off balance, it can cause you to have missed periods. Luckily, there are effective treatments for thyroid disorders, so see an endocrinologist for a blood test if you think this might be an issue for you.

late periods- Thyroid

Polycystic Ovary Syndrome (PCOS)

Little is known about what causes this disease, but about five million women in the United States may be affected by PCOS. Like thyroid dysfunction, PCOS can cause a hormonal imbalance in your body, causing missed periods.

Late periods-PCOS


If you’re entering perimenopause—the first stage of menopause—you may notice your periods occur more infrequently. The Estrogen hormone is causing a decrease in periods.

Late periods-Perimenopause


If you’re experiencing irregular periods, you’re not alone. About nine to 14 percent of women worldwide are affected by menstrual irregularities. With the exception of missing your period while on some contraceptives, it is not normal to go without a period for several months and can be harmful to your health. Visit your physician if your missed periods persist.

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20 Replies to “Why My Periods are Late?-Nine Major Reasons.”

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