When each egg breaks open, only the odd duck's egg remains.

After it's released, an egg will remain in a woman's fallopian tube for several hours to be fertilized.

Dormant eggs of certain species may remain in the sediment as well.

The fertilized eggs remain in the gills of the female.

The eggs remain in contact with the female's vascular tissue, which provides them oxygen.

Various strategies ensure the eggs and embryos remain in place, and do not drift with the current.

The eggs then remain in the male's care.

It is ovoviviparous - the eggs remain within the mother's body until they hatch.

But in the gravel, the eggs remain, a thousand or so from every female.

The fertilised eggs are not then laid but remain inside the female's oviduct.