First period, also known as menarche, marks the beginning of a girl’s reproductive years. The age when it begins varies from person to person. Typically, it happens between the ages of 12 and 14 and if you get your periods before this age, it is known as early periods. However, this early period also signifies concerning health issues. Researchers have been looking into whether how early you get your period affect your lifespan. Scientists are exploring a theory of aging called antagonistic pleiotropy. This idea suggests that some genes that are good for us when we're young like those that help us grow and reproduce early) can actually have negative effects later in life, causing us to age faster and get sick. While there hasn't been much clear proof of this in humans until now, a new study has looked at the connection between a woman's reproductive timing and her long-term health to find more answers. What Do Our Genetics Reveal About Aging? To find out if this theory is true, researchers used a special method called Mendelian randomization. This method uses genetic information to find connections between different traits, like the age of a woman's first period (menarche) and when she has her first child. They looked at how these events were genetically linked to a woman's overall lifespan and a variety of diseases that are common as we get older. The researchers also used a huge health database called the UK Biobank, which has information from almost 200,000 people, to double-check their findings. Do Women Who Get Their Periods First Age Faster? The study found strong evidence supporting a theory that genes helping us in our youth may harm us later. It showed that women who had their first period and first child later were genetically more likely to live longer and age more slowly. They also had a lower risk of several serious diseases, including Alzheimer's, type 2 diabetes, heart disease, and high blood pressure. On the flip side, having a first period before age 11 or a first child before age 21 was linked to a much higher risk of these same diseases. This included a nearly doubled risk for diabetes and heart failure and a quadrupled risk for obesity. Are There Other Long-Term Health Risks of Early Periods? Yes, research suggests that early menarche is connected to several other long-term health problems. Girls who get their periods at a younger age may be more likely to develop chronic diseases later in life. Physical Health Getting a period early can have lasting physical effects. It can limit a girl's final adult height. It's also been linked to a higher risk of obesity, heart disease, stroke, and diabetes. Additionally, these women face a higher chance of developing metabolic syndrome, a group of conditions that increase the risk of heart disease. Cancer Risk Studies show a clear connection between early menarche and an increased risk of certain cancers. Women who got their period at a younger age have been found to have a higher risk of breast cancer, as well as endometrial and ovarian cancers. Mental and Social Health The health risks aren't just physical. Girls who go through puberty early may face more emotional and social challenges. They can be more vulnerable to anxiety, depression, and bullying during their teenage years. Early periods have also been linked to a higher risk of engaging in risky behaviors.