How many cells are in fruits?

How many spermatogonia cells does a man have ? please give your source ! .?

• I understand that the spermatogonium cell pumps out primary spermatocytes which develop into 4 sperms cells over 63 days... but I wonder if there are few spermatogonia cells that are fast at pumping out primary spermatocytes or if there are many spermatogonia cells that take many hours to pump out the primary spermatocytes... So the question would be either: How many spermatogia cells does a man have ? or... How long is the spermatogonium's cycle: how many hours from the start of the production of a primary spermatocyte to start of the production of the next primary spermatocyte ? http://en.wikipedia.org/wiki/Spermatogenesis

• Answer:

  I think it is pretty impossible to estimate how many spermatogonia there are - there must be millions. There is something called the cycle of the seminiferous tubule which means that different parts of the seminiferous tubule are undergoing different stages of spermatogenesis so that there is always (after puberty) a continual production of new sperm.