Why are the eggs in the dreadnought?

I don't think that egg scene is in any ship, I think there are a lot of underground catacombs on the planet including the Head room and under the citadel and the corridors look similar shapes to the engineer ships.  Really not sure if the guys being Black Goo bombed are Engineers, but the presence of the heads implies Engineer involvement somewhere, even if the Goo Guys (sounds like a German porno!) are not engineers but some other human-ish race that they seeded....

I'm guessing the sequence of events is David giving Oram the tour of the lab then off to an eggy side room for some "Face-time"!

I wonder if Oram goes about his business after being facehugged, or if David is keeping him somewhere for the incubation period. 

Oram bursts inside an engineer structure which we can deduce from the architecture when the chestburst scene occurs.

ahhh....How long was Kane's incubation period?  

The exact time was never specified however it is speculated that it was one or two days earth time.

The Xenomorph was shown to incubate between 12-36 hours depending on circumstances and climate etc.

This does not include the Faster Rates in the AVP Movies never mind the Pred-Alien.

I dont want to go into spoilers, so this maybe is a tiny one...  Well nope i wont give my TWO Cents...

Just look at these shots.  Then you can make your own mind up.

Hmm... that is actually pretty helpful in deciphering the location of the eggs (plus we get a better look at them) thank you BigDave