How do I understand that Bajriga bird will lay eggs?

If breeding is successful after pairing, that egg will hatch. Remember that eggs have nothing to do with mating. Without mating, birds can lay eggs but will not produce babies. Interestingly, once mating, all eggs can be fertilized. After pairing, eggs can be laid 10-15 days after the first mating. How do you know your bird will lay eggs?
# The female bird will frequently enter and exit the nest
# The female bird will enter the bone and rub the bottom of the bone with its foot
# Will observe if the hive is safe to lay eggs, will look on the side of the hive
# Female is ready for mating if male likes
# The female bird’s vent or anus slowly swells
# Large foul-smelling poops or stools
# Sits on the bone for a long time
# More and more meetings
# The female bird does not come out of the nest at night after laying the first egg or two days
# The male bird sometimes enters the nest and feeds the female bird
# Female birds rarely come out of the nest, if they come out it is to eat or defecate
** Birds cannot retain calcium in their body and birds need a lot of calcium during egg laying, so calcium should be fed to birds before egg laying.