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  2. Apr 24, 2017 · Those who now erase that line may identify as both male and female, as neither male nor female, or as sometimes male and sometimes female. "They" is often the pronoun of choice. These individuals may use any number of terms to describe their gender identity: genderqueer, gender-fluid, gender-creative, gender-expansive.

  3. Jun 25, 2019 · A man's X and a woman's X combine to become a girl, and a man's Y combines with a woman's X to become a boy. But if the sperm don’t have equal Xs and Ys, or if other genetic factors are at play, it can affect the sex ratio. Researchers in England set out to determine whether this is true.

    • Puberty: It's Not One Size Fits All. Puberty's changes start when the brain triggers the production of sex hormones. Although physical changes follow a predictable pattern, every child develops at their own pace.
    • Budding Breasts Can Signal Puberty. Breast growth is usually the first sign of puberty girls will notice. First, small lumps form behind the nipples.
    • Boys: Genital Changes. The first sign of puberty in boys is subtle -- an increase in testicle size. About a year later, the penis and scrotum start to grow.
    • Hair Growth in Puberty. After breasts and testicles start growing, body hair will start to grow in and become thicker. For both boys and girls, new hair will start growing in the armpits and pubic area around the genitals.
  4. Knowing and feeling that you're a boy, a girl, a little bit of both, or not really either (no matter what genitals you have) is called your gender identity. It's OK if figuring out how you feel seems a little confusing. If you've never thought about this, you're probably cisgender and your genitals likely match how you feel on the inside.

  5. Print. Last Updated 06/2022. Reviewed By Jodie Johnson, MS, LGC. What Makes a Person a Boy or a Girl? Both “sex” and “gender” are related to being a boy or a girl. “Sex” is about a person’s body parts and how their body grows and develops. A person’s sex is due to a mix of genes and hormones.

  6. May 1, 2010 · But surprisingly, researchers have found very few large-scale differences between boys and girls in brain structure or function. Yes, boys have larger brains (and heads) than girls—from birth ...

  7. Being a boy or a girl, for most children, is something that feels very natural. At birth, babies are assigned male or female based on physical characteristics. This refers to the "sex" or "assigned gender" of the child.

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