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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. Prenatal sex discernment - Wikipedia

    en.wikipedia.org/wiki/Prenatal_sex_discernment

    Sex determination ban in India. Prenatal sex determination was banned in India in 1994, under the Pre-Conception and Pre-Natal Diagnostic Techniques Act, 1994. [6] The act aims to prevent sex-selective abortion, which, according to the Indian Ministry of Health and Family Welfare, "has its roots in India's long history of strong patriarchal influence in all spheres of life".

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

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

    The only REAL way to find out are scientific methods, like ultrasound (which can have a margin of error, especially if a boy is "shy" in the photos), amniocentesis, or non-invasive genetic testing ...

  5. Obstetric ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Obstetric_ultrasonography

    Transvaginal ultrasonography – Ultrasound is performed through the vagina; Transabdominal ultrasonography – Ultrasound is performed across the abdominal wall or through the abdominal cavity; In normal state, each body tissue type, such as liver, spleen or kidney, has a unique echogenicity. Fortunately, gestational sac, yolk sac and embryo ...

  6. 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).

  7. Timeline of human prenatal development - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_human_prenatal...

    Heartbeat can be detected by ultrasound. [7] Weeks 13 to 16 ... From week 13, sex prediction by obstetric ultrasonography is almost 100% accurate. [8]

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