This review discusses the state of the art in respect of the in vitro production of cattle
embryos. It is suggested that embryo production and quality might be improved by systems …

Offspring cloned from somatic cells have been reported in several species, including sheep
(Wilmut et al., 1997), mice (Wakayama et al., 1998), cattle (Kato et al., 1998), goats (Baguisi …

The present study was conducted to examine differences in the activation of pig oocytes
induced by sperm penetration or the artificial stimulators calcium ionophore A23187 and …

The objectives of this study were to:(1) investigate the efficiency of the intracytoplasmic
sperm injection (ICSI) procedure by using in vitro matured oocytes and frozen-thawed …

Considerable progress has been made in the in vitro production of pig embryos using
improved methods for in vitro maturation(IVM) and fertilization(IVF). Despite the progress …

Bovine oocytes were aspirated from ovaries within 1.6 to 2 hours after slaughter. They were
then matured in TCM-199 medium drops under oil in CO 2/air incubator at 39° C …

The effects of gamete coincubation time on porcine in vitro fertilization for 4, 6 or 8 hours in
Trial 1 or for 1, 2, 3 or 4 hours in Trial 2 were studied. The 876 oocytes were recovered from …

Polyspermic fertilization and embryo quality are important issues for the in vitro production of
pig embryos. We hypothesized that oocyte donor (prepubertal gilt vs. sow) affects …

The effect of the cumulus cells on in vitro fertilization (IVF) in cattle was evaluated. Frozen-
thawed bovine spermatozoa were treated with 5 mM caffeine and 10 μg heparin ml− 1 for …

Ejaculates from 3 young boars were collected on 4 occasions as a series of separate 15-ml
fractions. The contribution of different fractions of these ejaculates to observed variability in …