個体発生は一個体の成長過程を指す。
Kotaihassei wa i kotai no seichou katei o sasu.
Ontogeny refers to the developmental process of an individual.
個体発生の研究は発生学に含まれる。
Kotaihassei no kenkyuu wa hasseigaku ni fukumareru.
Studies of ontogeny are part of developmental biology.