My answer is not to. Jazz hated being wrapped, she just couldn't stand it from day one, would pull her arms out, and even now at almost two she doesn't sleep with blankets/doonas on because she just doesn't seem to like the 'heaviness' or restriction I guess.

Yeah she did startle herself, it was frustrating, but she hated being wrapped and would fight it, and I didn't want to force her into something that was obviously uncomfortable for her.