It's either a bruised or a cracked rib. Definitely okay on the placenta and definitely okay on the kidneys....only one little wee problem.
My ribs hurt like a motherf---er. Pass the codeine, and see you in the morning.
This kid must have the strongest feet and legs of any in utero entity ever. Definitely a runner, or a linebacker material. I just wish he'd learn to be gentle with his poor osteoporosis-prone mother.