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  2. 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 ...

  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. Sex selection - Wikipedia

    en.wikipedia.org/wiki/Sex_selection

    World map of birth sex ratios, 2012 The one child policy in China has contributed to the imbalanced sex ratios. Image shows a community bulletin board in Nonguang Village, Sichuan province, China, keeping track of the town's female population, listing recent births by name and noting that several thousand yuan of fines for unauthorized births remain unpaid from the previous year.

  5. XY sex-determination system - Wikipedia

    en.wikipedia.org/wiki/XY_sex-determination_system

    The idea is instead of having a simplistic mechanism by which you have pro-male genes going all the way to make a male, in fact there is a solid balance between pro-male genes and anti-male genes and if there is a little too much of anti-male genes, there may be a female born and if there is a little too much of pro-male genes then there will ...

  6. Sex-determination system - Wikipedia

    en.wikipedia.org/wiki/Sex-determination_system

    The male and female are the only sexually mature fish to reproduce. Clownfish are protandrous hermaphrodites, which means after they mature into males, they eventually can transform into females. They develop undifferentiated until they are needed to fill a certain role in their environment, i.e., if they receive the social and environmental ...

  7. IntelliGender Gender Prediction Test as accurate as a coin ...

    www.aol.com/news/2010-05-12-intelligender-gender...

    The "test," which sells for $30 or more at major retailers like CVS, Target and Walgreens, says it can tell expecting parents whether it's a boy or girl two months before they could find out from ...

  8. Variability hypothesis - Wikipedia

    en.wikipedia.org/wiki/Variability_hypothesis

    The 21st century has witnessed a resurgence of research on gender differences in variability, with most of the emphasis on humans. The results vary based on the type of problem, but some recent studies have found that the variability hypothesis is true for parts of IQ tests, with more men falling at the extremes of the distribution.

  9. 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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