OBJECTIVE: To evaluate clinical outcomes of day 2 versus day 3 ET using a culture media with no @entity413 or @entity1391 . DESIGN: Retrospective clinical study. SETTING: Hospital-based fertility clinic. @entity1 (S): One hundred seventy-six IVF-ET @entity1 undergoing controlled ovarian supraovulation. INTERVENTION(S): IVF and delaying the ET by 1 day. MAIN OUTCOME MEASURE(S): Number of blastomeres per embryo, implantation and pregnancy rates. RESULT(S): Delaying the ET from day 2 to day 3 after oocyte retrieval significantly increased implantation rates (13% versus 24%) and ongoing/delivered pregnancy rates per retrieval (26% versus 44%). Day 3 embryos with > or = 8 blastomeres resulted in a significantly higher pregnancy rate (53%) than day 3 embryos with < 8 cells (23%) and day 2 embryos with > or = 4 cells (31%) or < 4 cells (11%). CONCLUSION(S): Day 3 ET was associated with a significant increase in implantation and pregnancy rates. Delaying the ET until day 3 may permit the selection of more viable embryos than on day 2. The absence of @entity413 and @entity1391 from the culture media is compatible with good IVF outcomes.

Improved clinical outcomes for in vitro fertilization with delay of embryo transfer from 48 to 72 hours after oocyte retrieval: use of XXXX - and @entity1391 -free media.

@entity1 :: ('9606', 'Species') :: ['patients', 'PATIENT'] @entity1391 :: ('CHEBI:26020', 'Chemical') :: ['phosphate'] @entity413 :: ('MESH:D005947', 'Chemical') :: ['glucose']
@entity413 :: (MESH:D005947,Chemical) :: ['glucose']
