What are the step by step stages of human reproduction?

Human reproduction involves several key stages:

1. Gamete Formation: Sperm and egg cells (gametes) are produced through meiOSis in the male and female reproductive systems, respectively.
2. Fertilization: During sexual intercourse, sperm travels through the female reproductive tract to fertilize an egg, forming a zygote.
3. Implantation: The zygote undergoes cell division and develops into a blastocyst, which implants into the uterine lining.
4. Embryonic Development: The blastocyst develops into an embryo, followed by fetal development, culminating in childbirth.