This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infertility, Subject name: Gynaecology & Obstetrics
[{'content': 'In which case homologous aificial insemination is used in females: \nSelect and explain. \nA. Hormonal disturbance, B. Tubal block, C. Cervical factor, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cervical factor:cervical mucous protects sperm from the hostile environment of the vagina and also phagocytosis.cervical factor when cannot be treated is overcome by A procedures IUI,IVF,GIFT. cervical mucous quality improved by conjugated estrogen 1.25mg orally daily staing on day 8 for 5 days D.C.DUTTA&;S TEXTBOOK OF GYNAECOLOGY,Pg no:249,6th edition', 'role': 'assistant'}]