Human fertilization
![The acrosome reaction for a sea urchin, a similar process. Note that the picture shows several stages of one and the same spermatozoon - only one penetrates the ovum](/Images/godic/202501/11/Acrosome_reaction_diagram_en.svg2855.png")
![Illustration depicting ovulation and fertilization.](/Images/godic/202501/11/Blausen_0404_Fertilization2855.png")
![Fertilization and implantation in humans.](/Images/godic/202501/11/Human_Fertilization2855.png")
Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. Scientists discovered the dynamics of human fertilization in the nineteenth century.