Final answer:
Approximately 4 in 5 new mothers experience the "baby blues," characterized by emotional distress shortly after giving birth. Teenage mothers, especially those 15 years or younger, have a higher risk of child abuse, with the risk decreasing as the mother's age increases.
Step-by-step explanation:
The phenomenon known as "baby blues" affects a significant number of new mothers. While the question seeks a specific statistic, it is widely reported in the healthcare field that approximately 4 in 5 new mothers experience some degree of the baby blues.
However, when discussing teenage mothers and the risk of child abuse, studies show that younger mothers, specifically those who are fifteen years of age or younger, are twice as likely to abuse or neglect their children by age five compared to mothers ages twenty to twenty-one.