Does anyone actually know the life cycle of the xenos

fanboy79
MemberOvomorphApril 30, 20121254 Views14 Repliesi was just wondering what is the actual life cycle of the xenos we have come to love throughout the years.....though their are many movies in the series not one of them gives us an actual life cycle......
for example based on the film Alien parker and brett said 25 hrs before they could repair the ship....we know the actual time should have been about 17 as parker extended that due to his lazy nature....lol. from there on we speculate how long it took kane dallas lambert to get to derilict ship explore etc before kane was exposed to face hugger no time frame is given as far as how long the thing was on his face
another example in Aliens we see a citizen give birth when the marines are exploring the hive, but from what we know LV426 is at least months trip away from earth how long did it take the sulocio to get to the planet etc
another example there is never a timeline give from ripley being impregnated and the actual birth at the end of the film
answer anyone???