Identify when testosterone secretion begins.
1) Testosterone secretion starts at puberty, and continues for the rest of a man's life
2) Testosterone secretion starts shortly after birth, and continues for the rest of a man's life
3) Testosterone secretion starts at the fetal stage of life, and continues for the rest of a man's life
4) Testosterone secretion starts in the fetal stage of life, continues for a brief time after birth, and nearly ceases until puberty