1. Congenital hypoplasia of mammary glands leads to macromastia; 2. Reproductive sterilization and other reasons lead to breast tissue atrophy after endocrine disorders; 3. Mild breast ptosis; 4. Congenital breast ptosis; 5. Congenital bilateral breast asymmetry; 6. Congenital chest malformation, such as Polish syndrome; 7. Breast loss after breast surgery.