In vivo versus in vitro produced bovine ova: similarities and differences relevant for practical application
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In vivo versus in vitro produced bovine ova: similarities and differences relevant for practical application. / Holm, Peter; Callesen, Henrik.
In: Reproduction, Nutrition and Deveopment, Vol. 38, 1998, p. 579-594.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - In vivo versus in vitro produced bovine ova: similarities and differences relevant for practical application
AU - Holm, Peter
AU - Callesen, Henrik
PY - 1998
Y1 - 1998
N2 - - Abstract This present review describes some differences and similarities between bovine embryos produced in vivo and in vitro. The first part outlines the respective environments during maturation, fertilisation and early embryonic development of the two types of embryos and compares their mor- phological, biochemical and genomic characteristics. Results from comparative studies on embryo metabolism and gene expression reveal that most parameters are very similar, but some significant differences of presumptive importance for normal development have been described. Morphologic and kinetic differences between in vitro and in vivo produced embryos are also well documented. How- ever, improved culture conditions have been reported to minimise the differences. The second part focuses on the practical consequences of the differences in relation to embryo selection, cryo- preservation, sanitary risks and pregnancy following transfer as well as normality of calves. Lower viability following transfer and increased susceptibility to cryopreservation of in vitro produced embryos is discussed. Finally and most importantly, reported evidence of increased sanitary risks and abnormal foetal development associated with in vitro produced embryos is presented. @
AB - - Abstract This present review describes some differences and similarities between bovine embryos produced in vivo and in vitro. The first part outlines the respective environments during maturation, fertilisation and early embryonic development of the two types of embryos and compares their mor- phological, biochemical and genomic characteristics. Results from comparative studies on embryo metabolism and gene expression reveal that most parameters are very similar, but some significant differences of presumptive importance for normal development have been described. Morphologic and kinetic differences between in vitro and in vivo produced embryos are also well documented. How- ever, improved culture conditions have been reported to minimise the differences. The second part focuses on the practical consequences of the differences in relation to embryo selection, cryo- preservation, sanitary risks and pregnancy following transfer as well as normality of calves. Lower viability following transfer and increased susceptibility to cryopreservation of in vitro produced embryos is discussed. Finally and most importantly, reported evidence of increased sanitary risks and abnormal foetal development associated with in vitro produced embryos is presented. @
KW - in vitro
KW - in vivo
KW - morphology
KW - pregnancy
KW - preimplantation embryo
KW - sanitary risks
KW - viability
M3 - Journal article
VL - 38
SP - 579
EP - 594
JO - Reproduction, Nutrition and Deveopment
JF - Reproduction, Nutrition and Deveopment
ER -
ID: 141543810