Great episode. I am surprised that in 9 years of Grey's, the story of a Jehova's Witness hasn't been addressed before. I'm glad that Meredith is enjoying the pregnancy and I really hope they don't try and kill that storylline.
The relationship issues with Arizona and Callie were a little forced but relevant in order for them to deal with their patient. The future is definitely looking beak for SGMWH though.