Patent ID: 7041439

Claim:
A method of processing avian eggs according to gender, comprising: identifying live eggs among a plurality of eggs; extracting allantoic fluid from the eggs identified as live eggs, comprising: positioning each of the live eggs in an orientation whereby an allantois of each egg is caused to pool and enlarge an allantoic sac under an upper portion of each egg shell; inserting a probe into each egg through the shell of the egg and directly into the enlarged allantoic sac; and withdrawing a sample of allantoic fluid from the allantois of each egg via each probe; detecting a presence of an estrogenic compound in the allantoic fluid extracted from each live egg to identify a gender of each live egg, comprising: dispensing allantoic fluid extracted from the live eggs into respective receptacles; dispensing a biosensor into the receptacles, wherein the biosensor is configured to chemically react with an estrogenic compound in the allantoic fluid and change a color of the allantoic fluid; and detecting a color change of the allantoic fluid within the receptacles; and selectively injecting a vaccine into the live eggs according to gender.