This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
[{'content': 'In human, fertilization usually occurs in the \nSelect and explain. \nA. Fimbriated end of uterine tube, B. Ampulla of the uterine tube, C. Isthmus of the uterine tube, D. Uterine cavity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. (Ampulla of the uterine tube) (448 - Ganong) (423 - Ganong 23rd)* In humans Fertilization of the ovum by the sperm usually occurs in the ampulla of uterine tube** lined by ciliated columnar epithelium ** (AI - 09), occurs within few hours* Among 200- 300 million of sperms entering female genital tract only few thousand sperms reach the spot near the ovum and only one sperm fertilizes the ovum*** Implantation of the fertilized ovum occurs between 5-7 days after fertilization**.* Spermatogeneis occurs at temperature lower than core body temperature (AI- 09)', 'role': 'assistant'}]