That man is my father.

Sperm is a part of the beginning of life.

The ovum is the beginning of life.

A zygote is an early embryo formed by the union of a sperm and an egg from a male and a female.

There were many difficulties in the initial period of this project.

That woman is my mother.

This type of plant attracts a rare interest among women.

This project aims for the combination of science and art.

He combined two ideas to create a new project.

The development process of the embryo is very complex.