Pregnancy Rates of Human Reproduction & ART
Human reproduction is an unreliable process. In an average fertile couple, the probability of fertilization for any particular exposure of egg to sperm may be approximately 80%. But the probability of a live birth is actually 20% on an average.
Natural Pregnancy Rates
Usually,half of the early embryos fail to develop. These lost embryos are fundamentally abnormal and incapable of survival. If a menstrual period is missed, approximately one-fourth of the remaining embryos may still die later. Clinical studies show that the pregnancy rates in these people is a staggering 20% in active Married Couples not using Contraception
Infertility is defined as “inability to concieve after 2 years of Active Married Life”. In practical terms, if 10 couples try for a child, one or two couples will conceive every month. At the end of one year, nearly 9 out of the 10 couples will have a baby. 5 to 10 % couples fail to conceive . Infertility is not an abnormality but a condition, caused by both male and female factors. “Artificial Reproductive Techniques” are the answer to treat infertility and these have proven successful all over the world.
The rate of establishing a pregnancy from each egg by In Vitro fertilization (IVF) followed by embryo transfer cannot necessarily improve the rate of normal reproduction. Maximum success per egg in any one cycle is likely to be in the 20-30% range. In most experienced IVF programs, rates of ongoing pregnancy have 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.IVF pregnancy rates are one of the most misunderstood aspects of IVF treatment.
Choosing an IVF Clinic
IVF pregnancy rate statistics should never be used as the primary criterion for determining the actual quality of an IVF program. What should be kept in mind are factors like:
- The total experience
- Record of innovation
- Professional reputation of an organization
- Its history of sensitive caring for patients
- Integrity of its staff
Successful conception and childbirth for any specific couple cannot be guaranteed by any IVF program. The probability of success depends on many factors including the patient age, the cause of infertility, and the talent and experience of the IVF team. IVF is of demonstrated value for patients with absence of both fallopian tubes or irreversible tubal blockage (where corrective surgery has either failed or is inadvisable). Patients who are undergoing ART the cumulative pregnancy rate at the end of 4 attempts is in the region of 80%. The remaining 20% of patients can either opt for egg donation or adoption.
Overall the pregnancy rates in good IVF units worldwide is in the region of 30 to 40 % . Vani-IVF Centre has success rates, which are comparable to the best units in the world.