A few frogs produce live young ons with built-in-food supply.

The larvae of these species are nourished while they are growing

from an egg yolk which is born with them.

The African toad embryos take nourishment direct from their mother.

They feed on the secretion from the inside walls of the oviduct-

the tube through which the eggs leave the ovary.

They are born as fully developed tiny replicas of the adult.