Hi.

I would be comfortable assesing the Wikipedia reference-linkSIJ and L/S. Techniques are gentle and shouldn't be a problem.

With the whiplash, you should be able to do mobilisations or muscle energy in supine or sitting.

Yes I know that supine is considered risky in pregnancy but the risk is because of the IVC and risk of compression. If you keep your assessment and treatment quick ~few mins and rotate what you are working on, she should be just fine. Alternatively, have her lie on her right side slightly - pillow under left L/S and the spine should protect the IVC from being squashed.

I treat lots of pregnant women - if you are going to squash the IVC, they will tell you it is uncomfortable. I haven't had any probs yet (thank God!) and I have treated 41 week gestation mothers in prone and supine. Just get them comfy!

Hope that helps!