subinvolution of breast

例句：

1. 1. The patient'ssubinvolution was due to thegradual loss of muscle mass inher breasts.
   患者的乳房下垂是由于她胸部肌肉逐渐流失造成的。
2. 2. The agingprocess can lead to subinvolution in the breasts, which can affect one's self-esteem.
   随着年龄的增长，乳房可能会下垂，这会影响一个人的自尊心。
3. 3. Duringpregnancy, the breasts may experience subinvolution as a result ofhormonal changes.
   怀孕期间，由于激素变化，乳房可能会出现下垂现象。