Second try who returns for additional assisted reproductive technology treatment and the effect of a prior assisted reproductive technology birth
Live-birth rates were significantly higher for try 2 compared with try 1 for autologous fresh cycles, averaging 7.7 percentage points higher over five cycles.
Barbara Luke, Sc.D., M.P.H., Morton B. Brown, Ph.D., Ethan Wantman, M.B.A., Valerie L. Baker, M.D., Daniel R. Grow, M.D.
Volume 100, Issue 6, Pages 1580-1584, December 2013
To evaluate the effect of a prior assisted reproductive technology (ART) live birth on subsequent live-birth rates.
Historical cohort study.
The study population included 297,635 women with 549,278 cycles from 2004 to 2010 from the Society for Assisted Reproductive Technology Clinic Outcome Reporting System. Try 1 refers to ART cycles up to and including the first live birth, try 2 to ART cycles after a first live birth.
Main Outcome Measure(s):
Live-birth rates by cycle number, try number, and oocyte source.
Younger women at try 1 are more likely to return for try 2. Women returning for try 2 were more likely to have had an ART singleton versus multiple birth (33.2% after a try 1 singleton versus 8.1% after twins and 4.9% after triplets) and were less likely to have a diagnosis of diminished ovarian reserve or tubal factors. Live-birth rates were significantly higher for try 2 compared with try 1 for autologous fresh cycles, averaging 7.7 percentage points higher over five cycles. Live-birth rates were not significantly different for try 2 versus try 1 with thawed autologous cycles or either fresh or thawed donor cycles.
These results indicate that when fresh autologous oocytes can be used, live-birth rates per cycle are significantly greater after a prior history of an ART live birth.
Read the full text at: http://www.fertstert.org/article/S0015-0282(13)02779-9/fulltext