A provocative headline claiming that a woman’s breast size can reveal something about her vagina may attract attention online, but it is based on a common misconception about the human body.

Breast size does not reliably indicate the size, shape, appearance, or sexual characteristics of a woman’s vagina.

Human bodies develop in many different ways, and different physical characteristics do not necessarily predict one another.

Breasts vary considerably from person to person. Their size and shape are influenced by genetics, hormones, body composition, age, pregnancy, breastfeeding, and other biological factors. The vagina and vulva have their own anatomy and develop independently.

This means that looking at someone’s breasts cannot tell you what their genital anatomy looks like.

The misconception may come from the idea that all physical characteristics are somehow connected by a single underlying pattern. While hormones certainly influence many aspects of development, that does not mean that one visible body feature can be used to predict another person’s intimate anatomy.