Factors Affecting the Probability of Success in IVF

It is unlikely that the rate of establishing a pregnancy from each egg by fertilization and development in vitro followed by embryo transfer can improve better than the rate of normal reproduction. Therefore, the theoretical maximum success per egg in any one cycle is likely to be in the 20-30% range. In most experienced IVF program, rates ongoing pregnancy has usually been in this range or lower, even though more than one egg is often fertilized and several embryos transferred back into the uterus in most patients. We usually transfer two to three eggs.


IVF pregnancy rates are one of the most misunderstood aspects of IVF treatment . In brief, both practice and theory clearly indicate that IVF pregnancy rate statistics can be manipulated to achieve nearly any desired statistical percentage through patient selection, cycle cancellation procedures, cycle reclassification, numbers of embryos transferred, transfer and cryopreservation criteria, and other variables. None of this was managing of population data, however, help, and it may even adversely effect the care of the individual patient. Without controlling for all these variables, which is essentially never done and is extremely difficult to achieve IVF pregnancy rate statistics should never be used as the primary criterion for determining the actual quality of an IVF program. The total experience, record of innovation, professional reputation of an organization, its history of sensitive caring for patients, and the absolute integrity of its staff are far more useful guides to program selection.

Any IVF program cannot guarantee successful conception and childbirth for any specific couple even if the couple undergoes multiple attempts. The probability of success depends on many factors including patient age, the cause of infertility, and the talent and experience of the IVF team.

IVF is for demonstrated value for patients with absence of both fallopian tubes and irreversible tubal blockage (where corrective surgery has either failed or is inevasible). Couples with infertility related to lowered sperm counts or sperm motility usually have ICSI. Other causes of infertility treated with IVF include endometriosis and unexplained infertility.
There is no specific age limit for couples that may be considered for IVF except after menopause.

Evaluation for IVF may be done in person or by telephone consultation with a IVF physician. Adequate medical records should be brought on the day of your initial consultation or forwarded to the doctor: