Diagram of Duck Egg development Day 1
![Diagram of the development of a duck egg day one natural history illustration by Lizzie Harper](https://lizzieharper.co.uk/wp-content/uploads/2018/04/duck-egg-development-day-1-500x342.jpg)
Stylized diagram of the development of a duck egg from being laid until after hatching Day one yolk held in place with chalaza, germinal disc where fertilized chick starts to grow
Stylized diagram of the development of a duck egg from being laid until after hatching Day one yolk held in place with chalaza, germinal disc where fertilized chick starts to grow