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  2. Sex selection - Wikipedia

    en.wikipedia.org/wiki/Sex_selection

    Chinese Gender Calendar was buried in an imperial mausoleum with a history of over 300 years. It was calculated and deduced by the ancient Chinese based on Yin-Yang, Five Elements, Eight Diagrams and time. [59] This calendar is a simple chart who matches the day of conception of the future child with the age of the mother at the day of conception.

  3. Sexual selection in humans - Wikipedia

    en.wikipedia.org/wiki/Sexual_selection_in_humans

    Mutation and selection. The concept of sexual selection was introduced by Charles Darwin as an element of his theory of natural selection, [1] Sexual selection is a biological way one sex chooses a mate for the best reproductive success.

  4. Is it a boy or girl? 24 old wives' tales about predicting a ...

    www.aol.com/news/boy-girl-24-old-wives-214126391...

    If you’ve got that sought-after glow, people may predict you’re having a boy. 12 old wives’ tales about having a girl: You had morning sickness early in pregnancy.

  5. Sex assignment - Wikipedia

    en.wikipedia.org/wiki/Sex_assignment

    Sex assignment (also known as gender assignment [1] [2]) is the discernment of an infant's sex, typically made at birth based on an examination of the baby's external genitalia by a healthcare provider such as a midwife, nurse, or physician. [3]

  6. Is it a boy or a girl? 24 old wives' tales about predicting a ...

    www.aol.com/news/signs-youre-having-boy-girl...

    If you've got that sought-after glow, people may predict you're having a boy. 12 old wives' tales about having a girl: You had morning sickness early in pregnancy.

  7. XY sex-determination system - Wikipedia

    en.wikipedia.org/wiki/XY_sex-determination_system

    The XY sex-determination system is a sex-determination system present in many mammals, including humans, some insects (), some snakes, some fish (), and some plants (Ginkgo tree).

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