Embryology - Study of embryo is called as embryology. Zygote to emrbyo in uterus
Developmental biology - Study of pre natal period & post natal period is called as developmental biology.
Embryonic period/pre natal period - This period complete in female uterus or eggs.
Post embryonic period/ post natal period - After birth till to natural death
Ontogenetic development - Development of zygote to adult organism is called as ontogenic development.
Phylogenetic development- It is an evolutionary process in it origin of individual is studied from its ancesters.
Embryogenesis- If ontogenetic development through sexual reproduction or fertilized egg i.e. zygote called as embryogenesis. Sexual body is oozoid.
Blastogenesis - The development of new individual from asexual reproduction called as blastogenesis. Asexual body is blastema and developing animal is called blastozooid.