WilTec 52016, Operation Manual, Page: 13 / 14

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7. First check-up of the egg (after 5
–6 days): mainly to check fertilisation of the eggs. Sort out the unfer-
tilised, yellow, and dead eggs.
Second check-up of the egg (after 11
–12 days): mainly to check development of the embryo. A well-
developed embryo has already grown and formed inside blood vessels. The air chamber should be large
and clearly distinguishable.
Third check-up of the egg (after 16
–17 days): Light the egg from the side. A well-developed embryo has
still grown, filling nearly the entire egg, so that most of the light is absorbed. In case the embryo is dead,
the inside blood vessels are indistinct, parts near the air chamber have adopted a yellowish colour, and
the line between the egg and air chamber is not clearly visible.
3
rd
day 6
th
day 8
th
day
10 th day 15 th day 19 th day
8. During incubation, increase the air humidity and lower the temperature. This prevents the water in the
eggs from quickly evaporating. The air humidity corresponding to the defined values, dehydration pre-
vented from forming, and lowering the temperature are of capital importance to avoid too high a tem-
perature and too high an air humidity, especially when the hatching takes some time. The temperature
should not be above 37.5
℃
within 19
–21 days.