The pregnancy results suggest that IVF embryos result in diminished rates compared to traditional. 50 % +or - 5 % is about the expected rate. Traditional embryos are generally at least 5-10 % higher. IVF procedures do allow one to circumvent some common obstacles such as use of rare and expensive semen, cows not responding to traditional stimulation protocols and the most desired feature- reverse sorting for all females. The recent availability of sexed semen from Sexing technologies ( doing better than sex semen previously) could eliminate the need to reverse sort.
Dr. James Spears, American Embryo Transfer Association.
The viability is not significantly lower. My understanding is that the cost is higher.