they will repeoduce abt once a month..or 3 weeks..it's up to the male wether to make the female pregnant or not..

Livebearers have a "litter" approximately once every 40 days. One mating can result in as many as 7 litters - even if there is no male present in the tank after the initial mating.
10 fries is a very small litter!! My mollies had as many as 30 fries a time. My guppies and platys have around 40 a litter.

Thanks for the advece guys. I have a dalmation molly. She is a bit small, that must be why she dosent have very many. Or mabye she just got a little hungry after giving birth. She (My fish Ellie) has had 3 liters since. After the 3rd I gave my male away . Then she had her fourth when he was gone. She must have gotten pregnant before he left. They were mating for a while though. I was wondering also how old and big in size will the fry be when they can reproduce? My biggest fry are only mabye an inch. The youngest litter are less than a centimeter. And , do think a pet store that is not a chain buissenes would take some fry off my hands. I have way too many!