<s>[INST] I had abdominal tuberculosis 12 years back and has been cured. After 9 years of married i have not conceived yet. Also 3-4 iui s failed & one IVF cycle became failure at the primary stage itself i.e. after 48 hours of egg retrieval the eggs did not fertilise at all. Why the eggs did not fertilise is that due to tuberculosis i had earlier [/INST] Hi, Thanks for your query. I read your query and understand your concerns. Following is my reply: Failure of fertilization is not due to tuberculosis.  There might be some problem with egg, sperms or the temperature of incubator in IVF laboratory. I suggest you change over to different IVF center in your next cycle of treatment. If same thing repeats, you may have to consider donor semen / donor eggs. I hope I answered your query. I will be available for any follow-up queries you have.  Chat Doctor.  </s>