The project had taken 10 years to reach fruition, but the scientists finally achieved their goal and recovered the infant Chestburster before it could emerge.

Nevertheless, after seven failures and repeated refinements of the procedure, the USM scientists rallied their efforts to create an eighth, successful clone, an apparently perfect recreation of Ellen Ripley and the infant Queen gestating inside her. The research team had originally hoped to simply clone the Xenomorph Queen back to life from the samples, but this quickly proved impossible, and attempts at cloning Ripley and the Queen together resulted in genetic crossing, leading to horrifically deformed creatures that were essentially fusions of Ripley and the Xenomorph, combined at a genetic level. Wren, quickly discovered that it was extremely difficult, if not totally impossible, to separate the two species' DNA in the blood samples during the cloning process, owing to the Xenomorph's ability to incorporate elements of its host's DNA at the embryonic stage and thereby alter its own phenotype. Eventually the USM began trying to create a clone of Ripley using the blood samples and, hopefully, gain access to the Xenomorph Queen inside her. Over the following 25 years, the USM's science division also made considerable breakthroughs in cloning technology (which, despite profound technological advancements in other fields by the 2300s, had not been heavily researched due to cloning being deemed illegal). Owing to the Xenomorph's ability to share DNA with its host (the so-called ' DNA reflex'), this particular sample of Ripley's genetic material also contained the DNA of the Xenomorph embryo she had been carrying at the time the blood was extracted. In 2356, these samples passed on to the United Systems Military following the collapse of Weyland-Yutani. However, blood samples taken by Jonathan Clemens when Ripley arrived on Fiorina 161 were recovered by Weyland-Yutani when the facility was closed down. With the destruction of that embryo, all hope for developing the Xenomorphs as biological weapons was seemingly lost. Following the destruction of the original Xenomorph Hive and the derelict on Acheron, and the death of the Runner on Fiorina 'Fury' 161, Ellen Ripley committed sacrificial suicide to destroy the last known Xenomorph specimen in existence - the embryonic Queen developing inside her.

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