How to nurture parakeet eggs?

how do do I take care of parakeet eggs without their mom

You should ask a veterinarian because am not sure but I think you need an incubator or something like that. You should check if the eggs are fertlized or not because if they aint then your wasting your time. If I were you I wouldnt try to hatch the eggs myself because its hard plus it gets harder when they hatch because they need constent care but if you think you can do it go for it. Good luck.

how do you check if their fertile?