¿Qué significa Female alwayd produces one new pair, one male and one female, ( every month from its second month on.)

I'm confused with the place with parenthesises. ?

See a translation

This is how I would say it.

Females always produce one new pair, one male and one female, every month from its second month on.

I would not use parentheses in this sentence. But if you wanted to use parentheses, you could use them like this.

Females always produce one new pair (one male and one female) every month from its second month on.
Females always produce one new pair, one male and one female (every month from its second month on).

You can not use a comma *before* a parenthesis. You can not do this , (
But you can use a comma *after* a parenthesis if you need one. You can do this ),