Nope. Not likely. Deca remains in your body for up to three weeks after your last injection, unless you are using durabolon which is nandrolone phenylpropionate and that has faster acting ester and would be out of your bloodstream much sooner.
Interesting. I have been hearing this alot lately. Were you by chance doing a deca only cycle, knowing as a fact that it was gyno induced by the deca and not some other drug?