Infertility in parrots and cockatoos is something we all have experienced at one time or another in our aviaries. It always seems to happen with that special pair of very expensive birds that we have so wished would breed for the last couple of years. The eggs are laid we wait with anticipation and excitement then we candle them to check that they are fertile and then realize the bad news, that they are not. Disappointment is something none of us enjoy dealing with infertile eggs are just par for the course people say. But surely we should be questioning why we have a clutch of infertile eggs?