If you're wondering what this pregnant belly business is about, you have to know that mpreg (or male impregnation) is another popular trope of knotting. And while that deserves a whole post on its own (it exists both inside and outside the world of knotting and fan fiction) its connection to knotting can't be denied.
The term levocurvature of the lumbar spine means leftward deviation of the lumbar spine. The curvature is greatest (apex) at l4. Dextrocurvature or dextroscoliosis would refer to a rightward deviation of the spine. Would you like to video or text chat with me?
Levoscoliosis is a type of scoliosis, or curvature of the spine, in which the curvature occurs to the left. This leftward curve is one of the most dangerous types of scoliosis because the heart can be placed in danger. The symptoms of levoscoliosis may occur in early childhood, or may appear as late as in your 30s.