Amy was pregnant in "The Impossible Astronaut". If the Ganger was made after that, the Ganger would have been pregnant, too. These things duplicate clots and bow ties ... I doubt they'd miss a fetus.
They also achieve sentience in bad weather. I think Amy's was a bit more sophisticated than the dawn of the technology, considering it managed to hold a connection across (and beyond) space and time. Never mind that the gangers had that pasty eye-thing, and the one managed to split herself in two and grow a super-arm and transform into the Dr. Lazarus creature, meaning they weren't married to the original template, so I think someone with just a bit of know-how and gumption would be able an un-pregnant ganger from a pregnant baseline.