Related abilities

Has an established and reliable sleeping schedule (6-9 months)

Has an established sleep schedule (18-24 months)

Has an established sleep schedule (24-30 months)

Has an established and reliable sleeping schedule (12-15 months)

Has an established and reliable sleeping schedule (24-30 months)

Has an established and reliable sleeping schedule (3-6 years)

Has an established sleep schedule (9-12 months)

Is usually able to self calm to fall asleep (9-12 months)

Is usually able to self calm to fall asleep (12-15 months)

Is usually able to self calm to fall asleep (18-24 months)