What is the earliest age a boy can ejaculate?

Last updated on January 17, 2022

Question:

What is the earliest age a boy can ejaculate?

Answer:

One of the earliest indications of puberty is the testicles enlarging. Usually, the capability to ejaculate semen comes about one to two years after puberty starts — often about the time pubic hair begins to grow and a boy begins his growth spurt. The average age for starting puberty is 11 1/2. This makes the average age to ejaculate semen around the age of 13. But this is only an average. Puberty in boys is considered normal if it starts as early as 9 or as late as 16. Hence, some boys, even though they are normal, will not gain the ability to ejaculate until they are nearly 18 years of age or they may start as soon as 10.

Usually, when a boy begins to develop too early, it is an indication of a problem. Even when no problem is found, the boys tend to be smaller than average in height and have weaker bones. After searching through some records, I found the youngest age of a boy being able to ejaculate was eight.² There are some who claimed they started as young as six, but there is no supporting evidence. There is a report of a boy fathering a child at the age of 10 in Mexico.⁴ However, there is no mention of verifying that the boy is actually the father of the child. The youngest age verified of a boy fathering a child is 11.¹ The cases of these very young ages are extremely rare.

One study found “There was no correlation between the age at first ejaculation and testicular volume, pubic hair or penis length.” ³ In the study, the age of the first ejaculation varied from 12.5 years to 15. 5 years old; however, the bone age (a measure of development maturity) of the boys was more consistent (between 13 and 14). Thus, your first ejaculation correlates to your physical development and not to your actual age.

Sources:

1. “Britain’s youngest father identified publicly is Sean Stewart. In 1998 he became a father at aged 12 when the girl next door, 15-year-old Emma Webster, 15, gave birth in Sharnbrook, Bedford. They split up six months later.” [Times Online.]
2. Sexual Behavior in the Human Male, Alfred Kinsey
3. Z Laron, “Age at first conscious ejaculation: a milestone in male puberty,” PubMed.gov, March 1980.
4. “Alberto S., a Mexican boy of only 11 years could be the youngest father in the world. When he was just 10 years old, his parents traded him for cattle and he was forced to live with a 16-year-old girl, who is now the mother of his son, the Cadena website reported.” [“At just 11 years old, a Mexican boy is the youngest father in the world,” Telemundo, 12 November 2015. ]