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A brief, chilly spell can change the sex of chickens in the egg, the festival learnt yesterday. The finding, which has been patented, could eventually lead to big changes in the poultry industry. Temperature-dependent sex determination (tsd) during incubation is a well-known phenomenon in reptiles, whereas birds have genotypic sex determination (gsd) in which sex is determined at fertilization long before the incubation of eggs begins (). There is, so far, no convincing evidence that incubation temperature can affect sex ratios of bird hatchlings (pike & petrie 2002). Temperature-dependent sex determination (tsd) is a type of environmental sex determination in which the temperatures experienced during embryoniclarval development determine the sex of the offspring. Tsd differs from the chromosomal sex-determination systemscommon among vertebrates. It is the most popular and most studied type of environmental sex determination (esd).   to determine the sex of a baby chick, examine its wing feathers to see how long they are. If theyre all the same length, then its a male chick, but if they vary in length, its a female chick. Whether at the feed store choosing day-old chicks or hatching our own, all of us would probably enjoy knowing how to tell the sex of baby chicks to determine which are cockerels and which are pullets as soon as possible. Over the past 100 years there have been many methods developed for how to tell the sex of baby chicks some methods proved haphazard, some have proven quite effective. There are old wives tales on how to determine if your chick is a male or female, hen or rooster. Egg candling if the egg is fertile, you cannot determine the sex of the chicken. Tips no method of determining chick gender is 100 percent accurate other than simply waiting for the chicks to be born and then watching them develop. It can be costly to have your veterinarian determine the gender of your unhatched chicks, depending on the number of eggs you want to have checked and the facilities and equipment your veterinarian has access to. While there are various ways to sex baby chicks after they hatch (including wing feather length, feather color differences,. Are working on a spectroscope that will supposedly be able to do in-ovo testing three days into the incubation period to determine the sex of an egg before it hatches,.).

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