7 Common Reasons for Missed or Late Periods (Besides Pregnancy) | Life Medical Centre

7 Common Reasons for Missed or Late Periods (Besides Pregnancy)


A woman's menstrual cycle is a complex and intricate dance of hormones and bodily functions. The predictability of the menstrual cycle is often seen as a reflection of a woman's overall health. However, there are instances when this natural rhythm encounters disruptions, causing both confusion and concern. While a missed or late period is commonly associated with pregnancy, it's important to recognize that a plethora of other factors can play a role in influencing the timing of menstruation. In this comprehensive blog post, we will delve into seven prevalent reasons for missed or late periods, shedding light on the myriad of variables that can potentially interfere with the menstrual cycle. 

Global Statistics: 

Globally, menstrual irregularities affect a significant portion of individuals of reproductive age. According to the World Health Organization, around 2 in 10 women experience irregular periods at some point in their lives. Polycystic Ovary Syndrome (PCOS) alone affects approximately 5-10% of women worldwide, highlighting the widespread impact of hormonal imbalances on menstrual health. 

Normal Menstrual Cycle and Hormonal Regulation: 

Before we embark on understanding the various factors that can lead to missed or late periods, it's imperative to grasp the intricacies of a normal menstrual cycle and the hormonal symphony that orchestrates it. Typically spanning around 28 days, the menstrual cycle involves a delicate interplay of hormones such as estrogen and progesterone. These hormonal agents collaborate harmoniously to prepare the body for the possibility of pregnancy. If conception doesn't occur, the uterine lining is shed, giving rise to the phenomenon of menstruation. 

7 Common Reasons for Missed or Late Periods: 

Polycystic Ovary Syndrome (PCOS): 

Polycystic Ovary Syndrome is a prevalent hormonal disorder predominantly affecting individuals with ovaries. This condition can lead to irregular or absent periods due to the development of cysts on the ovaries. The hormonal imbalances characteristic of PCOS can substantially disrupt the predictable menstrual cycle.

Weight Fluctuations: 

Significant fluctuations in body weight, whether through rapid gain or loss, can exert a substantial impact on the menstrual cycle. Adipose tissue is implicated in the production of hormones, and dramatic changes in body weight can trigger hormonal imbalances, ultimately resulting in missed or late periods.

Eating Disorders: 

Conditions such as anorexia nervosa or bulimia can exert a profound impact on hormonal function. Severe restrictions in caloric intake or the cyclical nature of binge-purge behaviors can trigger hormonal imbalances that reverberate through the menstrual cycle.

Hormonal Imbalances: 

Hormonal imbalances not necessarily attributed to specific conditions like PCOS can significantly disrupt menstrual regularity. Stress, certain medications, and underlying medical issues can all contribute to fluctuations in hormone levels, affecting the timing of periods.

Thyroid Disorders: 

The thyroid gland plays a pivotal role in regulating metabolism and hormonal balance. Disorders such as hypothyroidism and hyperthyroidism can disturb this delicate equilibrium, resulting in irregularities in the menstrual cycle.

Excessive Exercise: 

While exercise is undeniably beneficial for overall health, excessive or intense physical activity can impose stress on the body. This stress can impede hormone production and subsequently give rise to missed or late periods, a phenomenon known as exercise-induced amenorrhea.

Hormonal Birth Control: 

While hormonal birth control methods are often employed to regulate menstrual cycles, they can also introduce variations. Some individuals may experience irregular bleeding or missed periods while using hormonal birth control methods.


The menstrual cycle stands as a sensitive barometer of a person's overall health and well-being. A myriad of factors, spanning hormonal imbalances to lifestyle choices, can exert a profound influence on its regularity. In instances of irregular or missed periods, it's imperative to consider these prevalent reasons beyond the realm of pregnancy. While occasional deviations in the menstrual cycle are deemed normal, persistent irregularities warrant the attention of a healthcare professional.
At Life Medical Centre, we wholeheartedly comprehend the pivotal role of a healthy menstrual cycle in nurturing holistic well-being. Our dedicated team of seasoned gynecologists specializes in addressing a spectrum of concerns related to reproductive health. We invite you to take the proactive step of scheduling an appointment with our specialized physicians, who are poised to offer tailored care and guidance tailored to your unique circumstances. The journey towards understanding and effectively managing your menstrual health begins here. To embark on this journey, simply reach out to us at 043 44 1122 and secure your appointment at Life Medical Centre.