Depemds - could start from 7 months and could be 1.5 yrs.
They begin to produce sperm during puberty. This can therefore be anywhere between 12 and 18 years. The average is around 14 though.
11-15
Males produce sperm from the age of puberty throughout adult life.
Average males usually become potentially fertile (produce sperm) at age 13, however aren't fully fertile until age 14-16. See link in related links.
Men produce sperm constantly. There are millions of sperms cells in the male testicles, and the amount produced increases once a male reaches puberty.
Boy produce sperm "usually" between the ages of 11 and 13. There are exceptions but this is the average age.
No, the sperm that males produce are produced are produced from scratch in the testes after they have developed to a productive state during puberty. which in Western Europeans is about age 13. it takes about 70 days for a sperm to develop to maturity. once sperm production has started a male will keep producing for the rest of his life.
females do not produce sperm
A soon as puberty begins a boy can normally produce sperm. It is highly unusual, but not impossible, for a boy to experience the onset of puberty at age 8. as above it could happen but the odds are very low
They can produce viable sperm as young as 4 months.
Most Men can and do produce sperm all their life, Unlike women, men produce live sperm continuously throughout their life. As they age, the ability to get an erection may impeded their ability to deliver it, and new research shows that it is not as lively & vigorous as men age, but most men produce sperm from Puberty throughout their lifetime.
Sperm generally starts being produced at around the age of 13 to 15. Remember this can vary depending on how fast the individual is developing.
There is a lot of variation in the ages at which boys can first produce sperm but on average around 12 to 14 is pretty common. Of course some boys can produce sperm earlier than this and some won't produce sperm until their late teens.
Of course they do. Sperm is produced whole life time