Kim my female budgie and her eggs

Question
I had 4 eggs then six now 8 eggs and it's been 30 days nothing has hatched Kim is in her box all day comes out for water snowy male  feeds her and allways attacks me when changing water etc .. Which is a good sighn managed 2 feel the egg once when Kim came out was at room tempruture check on her once in the morning she is a very tough budgie but I am worried about how long it's taking people told me 15 ,18,28 days till they hatch any help please?

Answer
Teddy,

It takes roughly 28-30 days for the eggs to hatch, after incubation has begun. This is usually when the last egg has been laid, not the first egg. I am curious, did you watch her mate with a male budgie, and did you candle the eggs to ensure that they were fertile?