No Eggs, No chicken

Ghost Solitare
MemberOvomorphApril 11, 20121048 Views8 RepliesIf you haven't visited this site, and you are a real fan of the franchise, take a look.
http://www.anchorpointessays.com/essays.html
We already know that the Engineers can create life, using technology, it just requires the ability to manipulate proteins, enzymes, and time. The question that's rotated back and forth through this forum regarding the eggs, has been beaten to death. If you visit this site & look up the topic "Invasive DNA Assimilation and Modification Reflexive Behavior" you could begin to formulate a different idea.
The facehugger doesn't implant an embryo in it's host. It manipulates the hosts molecular biochemistry in order to utilize it's metabolism to produce a xenomorph.
"In this process it is believed that I. raptus genetic material "invades" a host's DNA, which alters gene expression and activation. As this process occurs new genes are created, forcing the cells to function and exist in a manner that is more suitable to the development of an I. raptus embryo. It is also proposed that as this forced change occurs new proteins and amino acids are produced - creating a host environment that is drastically different than the original (even if only on the cellular/sub-cellular level)."
All of this happens in a matter of hours attesting to the ingenius work of the Engineers. The alterations also occur to the host organism ensuring that it survives the process and provides a stable environment for the developing organism. Though a work of fiction the theory does have hypothetical support from events in the subsequent films.
"In the medical records obtained from Fiorina 161 following Lieutenant Ripley's arrival: Lieutenant Ripley had been diagnosed with Post Traumatic Hibernation Disorder - a short-term illness caused by a sudden and improper awakening from hyper-sleep. The symptoms range from coma to disorientation accompanied by headaches, sore throat, cough, and/or nausea and vomiting - depending on the severity of the case. The symptoms of this disorder can last anywhere from 3 to 10 days - again, depending on the severity of the case. Lieutenant Ripley was diagnosed with slight disorientation, sore throat, cough, nausea, and minor headaches. She was also diagnosed with minor abrasions and lacerations, and the subcutaneous rupture of blood vessels throughout the cornea of the left eye. Within a matter of 8 hours all recorded symptoms - with the exception of a few lacerations - had completely healed. However, since there was even less understanding of the Alien and its capabilities at that time the healing of Lieutenant Ripley's wounds and symptoms was not associated with the presence of an I. raptus embryo."
So if we back things up a bit, we are dealing with synthetic viral vectors that once inside a host organism are able to insert targetted bits of their own DNA into the sequences of their host in order to fulfill their biomechanical imperative. In the simplest terms, the host organism manufactures the end product. The site goes into great detail regarding the life cycle of the various incarnations of Xenomorph. I'm sure you will enjoy giving it a once over, I'm sure Ridley did.