Nathan is almost four weeks old, so it was time to have him checked again. He weighs 4.380kg (after eating, so you can subtract 100g; yesterday he weighted 4.270kg, though two meals later), measures 55.5 cm, and has a head circumference of 37.5 cm. I think they missed last time, because he was 55.5cm then as well, and I cannot imagine him not having grown over the course of two weeks. For the rest, he checked out fine.
We got an appointment for a SIDS (Sudden Infant Death Syndrome) test, at the end of May. I'm quite happy the doctor was not reluctant to let him have it, because she thought we should not have had such a test when Elias was born, due to no family members having had children suffering from SIDS.