<prompt> Most common site of fertilisation is:InterstitiuinIsthumusAmpullaInfundibulum  <response>: Ans: C Ampulla Ref: Dutta: Textbook of Obstetrics 7th ed pg 21. 22Explanation:FERTILISATIONProcess of fusion of sperm with ovum forming zygote.Fertilisation occurs in the ampullary end of the tube.From ovulation to implantation Complete dissolution of corona radiata occurs by chemical action of hyaluronidase liberated from acrosomal cap of hundreds of sperm present at the site. 