Developing infant and Fertilized egg

Fertilized egg and developing infant are semantically related in unborn young topic. In some cases you can use "Fertilized egg" instead a noun phrase "Developing infant".

Fertilized egg noun - An animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life.

Developing infant and fertilized egg are semantically related in unborn young topic. You can use "Developing infant" instead a noun phrase "Fertilized egg".