The embryonating eggs were carefully monitored in the laboratory.

The fertilized egg began to embryonate.

The eggs of the parasite embryonate in the host's body.

The parasite embryonates inside the host's body.

Embryonization is a process in biology that involves the modification of an embryonic form.

Embryonation is a complex process that involves the formation and development of an embryo.

The scientist discovered a new type of embryonic-like cells.