The first pic is of both twins; Baby B is on the left and Baby A is on the right. This pic doesn't show Baby B very clear, so there is a single pic of Baby B below.
I read somewhere that the babies are the size of a grape this week. All of the major joints are working and moving, and the heart has divided into 4 chambers as the valves are forming. External sex organs have started to develop, but are not yet distinguishable as boy or girl!
Amazing how two little grapes can wreak such havock in my big body!!