OBJECTIVE: To select patients for day 3 vs. day 5 embryo transfer. DESIGN: Retrospective analysis of assisted reproduction technology (ART) cycles comparing outcomes of day 3 and day 5 transfers. SETTING: ART program of Brigham and Women's Hospital. PATIENT(S): Patients with day 3 or day 5 embryo transfers (n = 221 and 141, respectively). INTERVENTION(S): Cycles with eight or more zygotes were stratified by the number of eight-cell embryos available on day 3 (none, one or two, or three or more). MAIN OUTCOME MEASURE(S): Number of blastocysts, implantation rates, ongoing pregnancy rates, and number of fetal heart beats. RESULT(S): With no eight-cell embryos on day 3, 0% and 33% pregnancies resulted from day 5 vs. day 3 transfers. With one or two eight-cell embryos on day 3, ongoing and high order multiple rates were not different between day 3 and day 5 transfers. With three or more eight-cell embryos, day 5 transfer resulted in a decrease in multiple gestations but no difference in ongoing pregnancy rates compared with day 3 transfer. CONCLUSION(S): With no eight-cell embryos on day 3, a day 3 transfer is warranted. With one or two eight-cell embryos, any benefit of day 5 transfer appears to be equivocal. With three or more eight-cell embryos, day 5 transfer is recommended.
OBJECTIVE: To select patients for day 3 vs. day 5 embryo transfer. DESIGN: Retrospective analysis of assisted reproduction technology (ART) cycles comparing outcomes of day 3 and day 5 transfers. SETTING: ART program of Brigham and Women's Hospital. PATIENT(S): Patients with day 3 or day 5 embryo transfers (n = 221 and 141, respectively). INTERVENTION(S): Cycles with eight or more zygotes were stratified by the number of eight-cell embryos available on day 3 (none, one or two, or three or more). MAIN OUTCOME MEASURE(S): Number of blastocysts, implantation rates, ongoing pregnancy rates, and number of fetal heart beats. RESULT(S): With no eight-cell embryos on day 3, 0% and 33% pregnancies resulted from day 5 vs. day 3 transfers. With one or two eight-cell embryos on day 3, ongoing and high order multiple rates were not different between day 3 and day 5 transfers. With three or more eight-cell embryos, day 5 transfer resulted in a decrease in multiple gestations but no difference in ongoing pregnancy rates compared with day 3 transfer. CONCLUSION(S): With no eight-cell embryos on day 3, a day 3 transfer is warranted. With one or two eight-cell embryos, any benefit of day 5 transfer appears to be equivocal. With three or more eight-cell embryos, day 5 transfer is recommended.
Authors: Musharifa Muzaffar; Naresh L Selokar; Karn P Singh; Mohammad Zandi; Manoj K Singh; Riaz A Shah; Manmohan S Chauhan; Suresh K Singla; Prabhat Palta; Radheysham Manik Journal: Cell Reprogram Date: 2012-05-14 Impact factor: 1.987