David,
Congratulations on your fries. If you watch the adult guppies in action, you can easily tell who is the male. He is the one with the pretty colors and the female is bland looking. Also the male is always chasing the females for spawning. This type of fish is continually multiplying on a yearly basis. I would consider getting a larger tank for your many guppies. Many of the fries do not survive after birth for several reason. Some get eaten up by another larger fish, poor water conditions, improper feeding or the fry is not stable enough to mature.
Theresa

ok thanks but how do u tell the sexes from the fry they are still small oh and ive got 4 males and two females i think i should get more females