IVF success rates are the percentage of all IVF procedures which result in a favorable outcome. Depending on the type of calculation used, this outcome may represent the number of confirmed pregnancies, called the clinical pregnancy rate or number of live births, called the live birth rate or Take home baby rate.
Due to advancement in reproductive technology, the IVF success rates are substantially better today than they were just a decade ago. The success rate of IVF clinics depends on a number of factors including patient characteristics and treatment approaches. It is also important to understand that pregnancy rates are not the same as live birth rates. Generally, the live birth rate for each conventional IVF cycle (day 3 / 2 embryo transfer) is approximately:
- 30 to 35% for women under age 35
- 25% for women ages 35 to 37
- 15 to 20% for women ages 38 to 40
- 6 to 10% for women ages over 40
Of course, Day 5 Blastocyst transfers serve better for Infertile couples with more success rates and better take home baby rates ( 60 – 70 % ).