Fertilisation of the human ovum normally occurs in the

Explanation

The secondary oocyte is swept into the oviduct at ovulation and meets sperm in the wide upper third, the ampulla, within about a day. The zygote then divides as it travels down and reaches the uterus as a blastocyst several days later, so the uterus is the site of implantation rather than of fertilisation. Fertilisation in the ovary or in the abdominal cavity is possible but is an abnormal ectopic pregnancy.