2 doctors weighed in:

How come some girls have their period but do not have breasts?

2 doctors weighed in
Dr. James Ferguson
Pediatrics

In brief: Variability

The final breast shape, size and volume varies based on many genetic and some hormonal issues.
Some will have oversized structures that lead to back pain and posture problems. Some have the equivalent of a raisin on a pancake. Plastic surgeons make a great living reducing the big ones or adding to the small.

In brief: Variability

The final breast shape, size and volume varies based on many genetic and some hormonal issues.
Some will have oversized structures that lead to back pain and posture problems. Some have the equivalent of a raisin on a pancake. Plastic surgeons make a great living reducing the big ones or adding to the small.
Dr. James Ferguson
Dr. James Ferguson
Thank
Dr. Wesley Schooler
Surgery - Plastics

In brief: Genetics

Secondary sex characteristics like breast development vary in different people in timing and sequence.

In brief: Genetics

Secondary sex characteristics like breast development vary in different people in timing and sequence.
Dr. Wesley Schooler
Dr. Wesley Schooler
Thank
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