A good Ig owner never stops learning. Even folks who have had them for 10 years still learn and adapt care issues based on learning. Every Ig is different, and until we teach them to speak it's all a guessing game.
If the Ig lays eggs, it's certainly a female. LOL The responsible thing to do is freeze them for a day them discard them. Too many Igs in this country as it is.
Females will still lay eggs without a male present, obviously infertile, but still freeze them.
Males will enter heat once a year. But in Rex's case we don't even notice his heats. Females will go gravid once a year and it requires a vet check each time to insure no burst eggs or other "female" problems.
Igs will enter heat after their first year. Could be later depending on development.
Read up on gravid Igs and keep an eye out for the behaviors.