After residents of a small town are quarantine by the military, the adult male residents begin to show signs of pregnancy – with something that might not be human.

Sounds suspiciously like "The Midwich Cuckoos" which was made into a movie called "Village of the Damned" I think. Not a problem if you can tell a different story, just be aware of the similarity.

Presume some kind of thriller here but as you've acknowledged it is not much more than a premise at this point. Good luck with it.

That being said, it is a great premise. Adding a compelling lead character will just add to what you have already written.

Thanks everyone.

Yep, this is a premise not a logline. I need to think about what angle to take to make it more specific.