Can low testosterone in young girls affect breast development?

Generally speaking, whether low testosterone in young girls affects breast development depends on their specific hormone levels. If a young girl has low testosterone along with other abnormal hormone levels, it may affect breast development. However, if her testosterone is low but other hormone levels are normal, breast development may not be significantly affected. If any discomfort occurs, prompt medical consultation is recommended. Detailed analysis is as follows:

Although testosterone itself is not a primary factor in breast development, if a young girl experiences endocrine system disorders or other abnormalities—such as congenital adrenal hyperplasia or ovarian insufficiency—these conditions may lead to low testosterone levels and could simultaneously impair estrogen secretion or function, thereby potentially affecting breast development.

Breast development is primarily regulated by estrogen, especially during puberty, when rising estrogen levels initiate the process of breast development. Although testosterone is considered a male sex hormone, it is also present at certain levels in females and participates in regulating various physiological functions. In young girls, if testosterone levels are low but estrogen levels remain normal, breast development is generally not noticeably affected.

Parents should pay attention to their child's diet and lifestyle, ensuring balanced nutrition and appropriate physical activity to support healthy growth and development.