It disturbs me that a photo like this might be removed while others like the one below are allowed to remain.
I venture to guess that it's the fact that this image is NOT sexual that people find disturbing. I wonder if it's the fact that she's very human looking, very raw and emotional that upsets people. Her vulnerable state, her love and obvious joy may be off-putting to people, it reminds us of our own vulnerable state, our own humanity. In the same way that people seem to find breastfeeding images disturbing, I think they find childbirth photos equally upsetting. They remind us that we are not the airbrushed, sexualized vision we are used to seeing in the media.
They remind us that we are human.