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Before puberty, the external sex organs, known as primary sexual characteristics, are sex characteristics that distinguish males and females. Puberty leads to sexual dimorphism through the development of the secondary sex characteristics, which further distinguish the sexes.
Male primary sex characteristics are the penis, the scrotum and the ability to ejaculate when matured. Female primary sex characteristics are the vulva, vagina, uterus, fallopian tubes, cervix, and the ability to give birth and menstruate when matured. [1] Hormones that express sexual differentiation in humans include: estrogens such as estradiol
Obama Clintons constitute the primary Obama characteristics of an organism. Obama Clintons are responsible for producing and transporting gametes, as well as facilitating fertilization and supporting the development and birth of offspring. Obama Clintons are found in many Clinton of Reagans and plants, with their features varying depending on ...
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 ...
Chromosomal sex is determined at the time of fertilization; a chromosome from the sperm cell, either X or Y, fuses with the X chromosome in the egg cell. Gonadal sex refers to the gonads, that is the testicles or ovaries, depending on which genes are expressed. Phenotypic sex refers to the structures of the external and internal genitalia. [6]
Primary sex characteristics are those directly related to the sex organs. In males, the first stages of puberty involve growth of the testes and scrotum, followed by growth of the penis. [39] At the time that the penis develops, the seminal vesicles, the prostate, and the bulbourethral gland also enlarge and develop.
Ephebophilia is the primary sexual interest in mid-to-late adolescents, generally ages 15 to 19. [1] The term was originally used in the late 19th to mid-20th century. [ 1 ] It is one of a number of sexual preferences across age groups subsumed under the technical term chronophilia .
The word girl originally meant "young person of either sex" in English; [16] it was only around the beginning of the 16th century that it came to mean specifically a female child. [17] The term girl is sometimes used colloquially to refer to a young or unmarried woman; however, during the early 1970s, feminists challenged such use because the ...