The BioStreamer Re-Store™ improves the hatchability and chick quality of stored eggs. Previous field results proved that a Re-Store treatment enhances hatch and post-hatch performance. New data from a broiler hatchery confirm that a Re-Store treatment improves hatchability by reducing early, mid and late embryonic death.

Hatch of set, hatch of candled and hatch of fertile

Hatch of set (HOS) is the ratio of hatched chicks to the number of eggs in the incubator. Hatch of candled (HOC) is the ratio of hatched chicks to the number of eggs that passed the candling, the non-clear eggs. These two parameters are easily and often automatically obtained in a hatchery. 

Hatch of fertile (HOF) is the ratio of hatched chicks to the number of fertile eggs. This parameter can only be obtained after breakouts of the clear eggs. A lot of eggs that were fertile, but suffered early embryonic death are considered as clear eggs by the candling device. Therefore, breakouts are necessary to confirm if the clear eggs are truly infertile. Figure 1 shows a viable embryo at day 3 of incubation. If this embryo dies at the current stage of development, the candling device will probably wrongly identify this as a clear egg

broiler hatchery; trials; heat treatment; SPIDES
Figure 1: Viable embryo at day 3 of incubation.

In practice, HOF is often calculated without doing the time-consuming breakouts. The consequence is that the HOF is often mistaken as HOC. Since the real HOF gives valuable information, breakout analysis should frequently be undertaken. 


Re-Store enhances HOS and HOC

During several field experiments in a commercial broiler hatchery, data of HOS, HOC and HOF were obtained for different trials with and without Re-Store treatment. The different trials represent different flocks and flock ages. The improvement of HOS and HOC due to the Re-Store treatment for the different trials is shown in Figure 2

broiler hatchery; trials; heat treatment; SPIDES
Figure 2: Improvement of HOS and HOC due to a Re-Store treatment for different trials.

The HOC is significantly higher for the eggs that were subjected to a Re-Store treatment, with an average of 2.6%. This means that the Re-Store treatment reduces the mid and late embryonic mortality during incubation. 

The HOS is significantly higher as well for the eggs that were subjected to a Re-Store treatment and the improvement in HOS is always higher than the improvement in HOC, with an average improvement of 1.7% (average HOS is 4.3%). The HOF is independent of the Re-Store treatment, since a trial represents the same flock and flock age. This means that the additional improvement of HOS in comparison to HOC is due to the reduction of early embryonic mortality caused by the Re-Store treatment. 



By reducing early, mid and late embryonic death, the BioStreamer™ Re-Store enhances hatchability. Field trials show that HOS and HOC increased with an average of respectively 4.3 and 2.6 %. The Re-Store treatment once more confirms its potential to optimize hatchery results and maximize the profitability in a hatchery. 


BioStreamer™ is Petersime’s previous generation of single-stage incubators. Our engineers use innovative research and technology every day to constantly develop new solutions. Read more about our latest generation of intelligent single-stage incubators, X-Streamer™

About the author
Petersime Roger Banwell Sqr
Roger Banwell Senior Hatchery Expert

Roger Banwell holds a master’s degree in Electronic Engineering and Computer Studies. He has worked in the poultry industry for 40 years now. Ever since Roger joined the company in 2000, he has played a major role in the optimization of Petersime’s incubation technology. Roger previously held various positions in R&D, e.g. working extensively on the development and commercialization of single-stage incubation. After a long career in research, product development and customer support, he currently fills the role of advisor to the Petersime R&D department.

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