The baby girl has a hint of lower teeth.

Growth and development, healthy nutrition, happiness and auspiciousness.

1. Growth and development: The baby girl's first lower tooth indicates that her teeth begin to grow, which symbolizes her growth and development.

2. Health and nutrition: The growth of teeth needs good health and nutrition. The baby girl's first lower tooth can be regarded as a symbol of her good health and adequate nutrition.

3. Celebration and auspiciousness: In some cultures, the birth of a baby girl's first lower tooth is regarded as a joyous moment, representing auspiciousness and good luck.