The Orthodox feel that children, particularly the aborted and the miscarried, will be eternal children perhaps around the age of three, since this is the age at which (as Isaias puts it) "the child knows his left from his right".

There will be no sex in either Heaven or Hell. There is nothing in the Scriptures to indicate an increase in population in any form or by any means sexual or otherwise. This also means that sex through marriage may be honorable, but like doctors (an honorable profession) won't be needed.

Likewise, Saint Paul (1Cor 6:13) "Foods for the stomach and the stomach for foods but God will destroy both it and them." However, "we shall be like He is" and "He ate and drank with us." Therefore we will not need to eat, but we could, though not to excess.