Ninja Baby did very well at his 4 month check up on Tuesday, although his shots did make him grumpy but that is to be expected.
Here were his vital stats
Weight: 6.45 kg (14lb 4oz)
Height: 63 cm (25")
So everyone who answered the poll thought that he was taller than he actually is. NB growth was slower than expected (both height and weight) since December but the doctor is not concerned.

More pictures soon.

ETA (April 8): I thought I had posted this in February and was surprised to see it listed as a draft. Whoops.