Reproduction in Humans Sexual reproduction – In humans occurs when a female’s ovum and a male’s sperm fuse. These gametes are made during the process of meiosis. Produces babies which are all different from their parents. This variation is important for the survival of the entire species. Female reproductive system Is mostly internal. The external opening of the vagina leads up to the uterus, which has 2 fallopian tubes branching off that connect to the ovaries. The ova are produced by the ovaries. Once released during ovulation, the ova move slowly down the fallopian tube towards the uterus. It is in the fallopian tubes where fertilisation by a sperm usually occurs. Male reproductive system Both the penis and testes are external. The sperm are produced in the testes. The testes are contained within the scrotum. To get outside of the body, the sperm move up through the vas deferens, has seminal fluid added from the seminal vesicles, and then moves into the urethra and out through the penis.