Tag: Micromastia

Genetic factors are the most significant predictor of natural breast size in women, dictating the volume of glandular and fatty tissue. Understanding these inherited traits, alongside hormonal influences and body composition, is key to comprehending what causes a flat chest. This authoritative guide offers a detailed look into the topic.

Genetics is the number one determining factor for breast size, influencing over 50% of the variation among women. If you find yourself asking, **why am I so small chested**, it is important to remember that breast size is influenced by a complex interplay of genetic, hormonal, and environmental factors.

According to a 2018 study, breast size is a highly heritable trait, with genetics playing a significant role. This inheritance, along with other factors, answers the common question: what causes small chests? For many, the answer lies within the unique blueprint of their body, guided by a combination of genetics, hormonal balance, and body composition.

Breast size is largely determined by genetics and body composition, not necessarily a sign of a health problem. Knowing **How to know if a girl is flat chested?** requires understanding that this is a subjective descriptor, not a strict medical classification based on a simple visual check.