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Morphology and hatch process of embryos cultured in vitro. a Morphology of fertilized and parthenogenetic embryos cultured in vitro for 96 h in 20% or 5% O2. Bar = 50 μm. b Morphology of fertilized and parthenogenetic embryos cultured in vitro for 120 h in 20% or 5% O2. Bar = 50 μm. HFE and LFE, fertilized embryos cultured in 20% and 5% O2 respectively; HPA and LPA, parthenogenetic embryos cultured in 20% and 5% O2 respectively
