After fertilization, the resulting cell which gives rise to a new individual is the

The immediate product of fertilization, formed by the fusion of male and female gametes, is called a zygote.

Ovum is the unfertilized egg. Zygote, on division develops into an embryo, which gets implanted in the maternal uterus. Foetus is the stage when all body parts of the baby are recognizable and appear similar to the adult beings.