If you are looking for decent success rate in India, then Kolkata is the one that comes up with decent and high success rate all over India. IVF treatment success rate somehow relies on major factors like the age of the woman, embryo quality and sperms motility. Generally, women who are below 35 have more chance to conceive by IVF course of medication. The fertility experts in Kolkata also make the pregnancy possible for those women who have crossed the age of 40 and are confound to select appropriate clinic for them. Success rate of IVF in Kolkata is 60-70%, rest of all factors depend upon the age, the quality of the eggs and the count of sperm.