Question

how reproduction is start

Answer 1

In the human reproductive process, two kinds of sex cells, or gametes, are involved. The male gamete, or sperm, and the female gamete, the egg or ovum, meet in the female's reproductive system. When the sperm fertilizes, or meets, the egg, this fertilized egg is called the zygote.

Answer 2

Human reproduction is any form of sexual reproduction resulting in human fertilization, typically involving sexual intercourse between a man and a woman.