Final answer:
The consequences of the secular trend in puberty include earlier puberty for girls, the body's signals to have sex appearing before marriage, and it does not result in teenage pregnancy being more of a threat.
Step-by-step explanation:
The consequences of the secular trend in puberty include various changes in physical development among teenagers. One consequence is that girls tend to reach puberty earlier than boys. Another consequence is that the body's signals to have sex appear many years before marriage. Additionally, the secular trend is not directly linked to teenage pregnancy being more of a threat.