Infertile couples may be spared years of fruitless treatment with the discovery that the human egg can read the father's genetic key and screen out failures.

人类的卵细胞可以阅读父亲的基因钥匙并且筛除失败，这一发现可能会节省那些不孕不育夫妇数年的毫无成果的治疗。

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In the cloning experiment, cells from an infertile father would be injected into an egg, which is then implanted in the mother's uterus for the pregnancy.

CNN: Team to attempt human cloning

The theory is that the protein in sperm which triggers chemical changes in the egg, leading to embryo development, is defective or missing from the sperm of some infertile men.

BBC: Sea squirts aid fertility research