I'll bet pregnancy and delivery has long been inspiration for alien depiction.
Quote:
Bishop: I'm afraid I have some bad news.
Hudson: Well that's a switch.
Burke: Ripley? You know I expected more from you - I thought you'd be smarter than this.
Ripley: Well, I'm happy to disappoint you.
Ripley: How long after we're declared overdue can we expect a rescue?
Hicks: [pause] Seventeen days.
Hudson: *Seventeen days?* Hey man, I don't wanna rain on your parade, but we're not gonna last seventeen hours! Those things are gonna come in here just like they did before. And they're gonna come in here...
Ripley: Hudson!
Hudson: ...and they're gonna come in here AND THEY'RE GONNA KILL US!
Ripley: HUDSON! This little girl survived longer than that with no weapons and no training.
[to Newt]
Ripley: Right?
[Newt apes a salute]
Hudson: So why don't you put her in charge?