Children first begin to develop a sense of biological gender at around the age of 2 to 3 years.1 At this age, they are able to label pictures of boys and girls according to typical presentations of heteronormativity. At 4 years, boys understand that it is the possession of a penis that marks them out as biologically male and girls understand it is the lack of a penis that means they are biologically female. By this age, children have a sense of the stability of biological gender, an understanding that it remains constant with time. From this point up to the age of 6 or 7 years, their judgement of gender in pictures of clothed children is heavily influenced by appearance so that they label boys pictured in dresses as girls and boys with long hair as girls. By 7 years they recognise biological sex as constant and independent of external appearance.1
By the age of 7 years, therefore, children understand three different concepts related to sex/gender identity: biological sex, self-perceived gender identity and social gender identity. They understand that they and others are biologically male or female, that they and others have a sense of their own gender identity as male or female and that they and others, depending on their appearance and clothing, are usually perceived by others as male or female. As they develop into adolescence and adulthood, people recognise that, with the use of hormones and surgical interventions, some features of biological sex can be changed. Both self-perceived gender identity and social gender identity may also undergo change.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10063975/
Can anyone explain what she is saying? pic.twitter.com/SCPTcajrfs
— David Vance (@DVATW) August 7, 2023
h/t A Deplorable Neanderthal