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2. Child development stages - Wikipedia

   en.wikipedia.org/wiki/Child_development_stages

   Physical development. Typically grows at a similar rate to the previous month, usually growing between 1 and 1.5 inches (2.5 and 3.8 cm) and gaining about 2 pounds (910 g). [23] Resting heart rate is usually between 80 and 160 beats per minute, and it typically stays within that range until the infant is about one year old. [18] Motor development

3. Bayley Scales of Infant Development - Wikipedia

   en.wikipedia.org/wiki/Bayley_Scales_of_Infant...

   The Bayley Scales of Infant and Toddler Development (version 4 was released September 2019) is a standard series of measurements originally developed by psychologist Nancy Bayley used primarily to assess the development of infants and toddlers, ages 1–42 months. [1]

4. Child development - Wikipedia

   en.wikipedia.org/wiki/Child_development

   This develops to more rhythmic movements of the entire body at 3 to 5 months to demonstrate the child's anger or delight. [127] Between 9–12 months of age, children view themselves as joining the communicative world. [117] Before 9–12 months, babies interact with objects and interact with people, but they do not interact with people about ...

5. Early childhood development - Wikipedia

   en.wikipedia.org/wiki/Early_Childhood_Development

   Early childhood development is the period of rapid physical, psychological and social growth and change that begins before birth and extends into early childhood. [1] While early childhood is not well defined, one source asserts that the early years begin in utero and last until 3 years of age.

6. Babbling - Wikipedia

   en.wikipedia.org/wiki/Babbling

   Around 4 months, babies may vary their pitch, and imitate tones in adult speech. [14] Around 5 months, babies continue to experiment with sound, imitating some sounds made by adults. [14] Around 6 months, babies vary volume, pitch and rate. When infants are 6 months old they are finally able to control the opening and closing of the vocal tract ...

7. Infant visual development - Wikipedia

   en.wikipedia.org/wiki/Infant_visual_development

   The vision of infants under one month of age ranges from 6/240 to 6/60 (20/800 to 20/200). [4] By two months, visual acuity improves to 6/45 (20/150). By four months, acuity improves by a factor of 2 – calculated to be 6/18 (20/60) vision. As the infant grows, the acuity reaches the healthy adult standard of 6/6 (20/20) at six months. [5]

8. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

9. Human embryonic development - Wikipedia

   en.wikipedia.org/wiki/Human_embryonic_development

   Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 40 weeks. The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus.