This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'IVF is mainly done for - \nSelect and explain. \nA. Uterine factor, B. Tubal blocks, C. Male partner has a count of 12 million/ml, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Tubal blocks In vitro fertilization and embryo transfer (IVF-ET)Indicationsi) Tubal pathology/blocksii) Male factor: count less than 5 million/mLiii) > 6 IUI failuresBasic steps of IVF* Ovarian stimulation with gonadotropins and follicular monitoring* Oocyte retrieval (ovum pickup) done through TVS-guided needle* Fertilization: 50,000 sperms are put on each oocyte retrieved* Embryos kept in incubator for 48-72 h* ET done on day 2 or day 3 (48-72 h) after oocyte retrieval* Generally 2-4 embryos are transferred in the uterine cavity via catheter and deposited 1 cm below the fundus* Success rate of IVF per cycle is 30-35%", 'role': 'assistant'}]