child idividual timeline By emccormack773 Period: Jan 1, 2019 to Sep 1, 2019 prenatal stage last from conception to birth Period: Oct 2, 2019 to Oct 16, 2019 neonatal stage last from birth to 2 weeks Period: Oct 16, 2019 to Jan 1, 2020 infancy stage last 2 weeks t first birthday Period: Jan 1, 2020 to Jan 1, 2023 toddler stage last 12-36 months Period: Jan 1, 2023 to Jan 1, 2029 preschool stage last 3-6 years Period: Jan 1, 2029 to Jan 1, 2031 school-age stage last 6-12 years