My DD will be 16 weeks old on Sunday. She has slept through since around 9 weeks old (from about 8.30pm/9pm to 7am. The past few nights she has been waking up a couple of times, not crying just babbling away! This has made her sleep until 8am instead of 7am. Also on some days she has dropped her morning nap (30mins) and instead had a longer nap of around 2 hours from 11.30.
Is this sleep regression or trying to settle in a new routine?