Is my text right ???

Yes there are many mistakes, 'your text' is not right.

Perhaps if you put it in your own language as well someone could help you.

Um no it's not good at all. I'll break it down sentence by sentence:

-"Young girls have a great child desire."

What does this mean?? That they want to have babies? I don't understand what you're trying to communicate. We don't say "have a great child desire," but would make more sense to say "have a great desire to have a child or children"

-"In addition the young persons/people become always in form times ripe"

Ok I don't know what you are saying here either with "in form times ripe"

-"For hundert years girls get the first period in a age of 16."

I think you meant : For hundreds of years girls have gotten their first period at the age of 16.

-"1980 with eleven one half."

Again, what??

-"And 2010 even with 10 years."

This makes no sense at all :(.

-"12% of the girls 15% of the boys don't use any contra ception by the first sex."

You should say : Twelve-percent of girls and 15% of boys don't use any contraception during their first sexual encounter.

All in all : you really need to work on your english because it's hard to even take a guess at what you're trying to say in most of those senteneces :/

that's perverted