lovebirds eggs

Question
ok, we had a few eggs (4)before,about 5 weeks . they didn,t hatch so we took they out.And three weeks later she laid the four we have now .she laid the fourth one abuot two days ago. so what we need to know is how long do we leave them in before there no good.or do we just leave them in there so she don't lay more????
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-----Question-----
i have two lovebirds. they have 4 eggs. what do i do now. 1male , 1female.?????
-----Answer-----
Where are the eggs? If they are in a nest box then you need do nothing, the hen bird will look after them and if they hatch in about 23 days after the second egg was laid, the parents should feed the chicks. In any case leave the eggs with the birds as if you take them away the hen will keep laying and make herself ill.

Make sure they have plenty of calcium in their diet at this time.

You can check the fertility of the eggs by holding them to a strong light when you will see blood if fertile, and of course if they are fertile you have a male and a female.

Answer
Leave them for 30 days, if they don't hatch take them away. The hen will probably lose interest in them before that if they dont hatch.

You cant stop her laying. She will do this 2 or 3 times a year even if there is no male, and if there is no male, there are two females, right? So both of them will lay.