![]() Results of non-invasive imaging technologies revealed that the storage of eggs for 10 days impaired embryo growth as early as 11 days of incubation (decrease in brain and embryo volumes). However, the mortality of viable eggs was increased in the D10 group compared to the D3 group. First, data showed that the fertility and sex ratio of eggs were not affected by storage duration. ![]() Eggs were analysed by magnetic resonance imaging (MRI) and CT to assess the development of the embryo and internal egg changes occurring during incubation. Eggs stored for three or 10 days were further incubated for 11, 13 or 15 days (37.8☌, 55% RH). The results revealed that a storage duration of up to 10 days negatively affected some egg quality traits (yolk index and volume, air chamber volume and egg white pH). We explored the effect of storage duration (zero, three or 10 days D0, D3 and D10, respectively) at 16☌, 80% relative humidity (RH) on egg quality (Broiler, Ross 308), using computed tomography (CT) and classical measurements (egg weight, eggshell strength, egg white pH, Haugh units, yolk index and colour). While storage temperatures of 16–18☌ are classically used in hatcheries, the duration of storage varies from three to more than 10 days. However, the conditions used to store eggs can have major impacts on egg quality and the subsequent viability of chicken embryos. Storing fertilised eggs prior to incubation is a frequent practice in commercial hatcheries to coordinate activities and synchronise hatchings. 3INRAE, Université de Tours, BOA, Nouzilly, France.2INRAE, CHU de Tours, Université de Tours, PIXANIM, Nouzilly, France.1INRAE, CNRS, IFCE, Université de Tours, PRC, Nouzilly, France.To reduce problems that cause poor hatch rates, review proper egg care and incubation procedures prior to starting your hatch.Hans Adriaensen 1,2 Vanille Parasote 1,2 Ines Castilla 1,2 Nelly Bernardet 3 Maeva Halgrain 3 François Lecompte 1,2 Sophie Réhault-Godbert 3* This is by no means a complete list of reasons for an unsuccessful incubation.There can be genetic problems with the embryos, too much humidity early on, and eggs that were jostled before (or during) the hatch, to name just a few. Here is a chart of embryo development that is very helpful for determining when the death of an embryo occurred during incubation. Hopefully, the next hatch will be more successful after you learn what mistakes were made this time. If the eggs were not turned and fully formed chicks were unable to hatch, you’ll have notes about forgetting to turn the eggs properly. This will allow you to compare the end of embryo development to the dates that problems were noted. ![]() If the temperature drops or spikes, the humidity trays dry out, or you forget to turn the eggs… make a note of it on your incubation calendar. It is also advisable to make notes during the incubation period if anything unusual happens. Here’s a great way to keep track of the hatch conditions and improve… Take Notes During Incubation It can be frustrating to lose chicks and wonder what could have killed them. Hopefully, each time you hatch eggs in an incubator you’ll have better success rates. Eggs that never develop an embryo may be removed early in the incubation to prevent rotting and bursting open. It’s a good idea to candle the eggs every week during incubation.
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