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Drawing on some transsexualism cases, Garcia-Falgueras and Swaab state that "[f]rom these examples it appears that the direct action of testosterone on the developing brain in boys and the lack of such action on the developing brain in girls are crucial factors in the development of male and female gender identity and sexual orientation".
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]
The Tanner scale (also known as the Tanner stages or sexual maturity rating (SMR)) is a scale of physical development as pre-pubescent children transition into adolescence, and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics , such as the size of the breasts ...
These two studies support the notion that toy preferences, while gender-based, are not a perfect indication of gender identity [citation needed]. Further, a study by Jadva, Hines, and Golombok showed that while male and female infants show more visual attention towards toys specific to their gender, there is no significant sex difference in ...
gender identity: the child recognizes that they are either a boy or a girl and possesses the ability to label others. gender stability: the identity in which they recognizes themselves as does not change; gender consistency: the acceptance that gender does not change regardless of changes in gender-typed appearance, activities, and traits.
Children can identify themselves as belonging to a certain gender as early as two years old, [151] but how gender identity is developed is a topic of scientific debate. Several factors are involved in determining an individual's gender, including neonatal hormones, postnatal socialization, and genetic influences. [ 152 ]
By doing this, doctors can track a child's growth over time and monitor how a child is growing in relation to other children. There are different charts for boys and girls because their growth rates and patterns differ. For both boys and girls there are two sets of charts: one for infants ages 0 to 36 months and another for ages 2 and above.
A toddler is a child approximately 1 to 3 years old, though definitions vary. [ 1 ] [ 2 ] [ 3 ] The toddler years are a time of great cognitive, emotional and social development. The word is derived from "toddle", which means to walk unsteadily, as children at this age do.