human fertilization

Human fertilization occurs when a male's sperm cell joins with a female's egg cell during sexual reproduction. This typically happens in the fallopian tube, where a single sperm penetrates and merges with the egg. The combined genetic material forms a zygote, which begins dividing and developing into an embryo. Fertilization marks the beginning of pregnancy, leading to the growth and development of a new human life. The process is influenced by various biological factors, ensuring that only one sperm usually fertilizes the egg and initiating the earliest stages of human development.