Effects of medium composition on murine and human blastocyst formation and hatching rate.

Abstract:

PURPOSE:Murine two-cell embryos (n = 5573) were cultured for 96 hr in human tubal fluid (HTF) medium (n = 2709) or alpha modification of minimum essential medium (MEM; n = 2864) through the hatched blastocyst stage from mid-1990 to mid-1991. An additional 373 embryos were cultured in MEM or HTF with 0, 1, 5, or 10 ng/ml E. coli endotoxin. A total of 17 patients had supernumerary embryos simultaneously cultured in HTF (n = 48) or MEM (n = 61). Additionally, pregnancy rates were compared for July to December 1990, when MEM was used as growth medium, and for July to December 1989, when HTF was used. RESULTS:Blastocyst formation was higher (P < 0.001) for murine embryos cultured in MEM (blasts = 95%) compared to HTF (blasts = 70%). When cultured with endotoxin, blastocyst formation was higher (P < 0.01) for embryos cultured in MEM compared with HTF for controls and at each endotoxin level. No difference in human blastocyst development was observed in HTF and MEM. However, more MEM-cultured blastocysts were cryopreserved (P < 0.05). There also was a lower spontaneous abortion rate and a higher multiple gestation rate when embryos were cultured in MEM. CONCLUSION:Thus, MEM may result in healthier blastocyst development, especially when culture conditions are substandard, although this is not an acceptable substitution for meticulous technique.

journal_name

J Assist Reprod Genet

authors

Olar TT,Potts AS

doi

10.1007/BF01239220

subject

Has Abstract

pub_date

1993-04-01 00:00:00

pages

192-6

issue

3

eissn

1058-0468

issn

1573-7330

journal_volume

10

pub_type

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