Duck egg placement

[copperduck]

Does it matter what position the eggs are in the day they are supposed to hatch? Should they be upright or on it's side or does it even matter

 

[Amiga]

I am not a hatcher, but I think some hatchers say it matters. Here is a link http://www.lwbarnhouse.com/method1.html

and

https://www.backyardchickens.com/t/491013/goose-incubation-hatching-guide-completed