Blastula and Developing infant

Blastula noun - Early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs.

Developing infant and blastula are semantically related in unborn young topic. In some cases you can use "Developing infant" instead a noun "Blastula".

Blastula and developing infant are semantically related in unborn young topic. You can use "Blastula" instead a noun phrase "Developing infant".