How to Determine the Gender of an Unborn Baby

Written by sarah metzker erdemir
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Expectant parents often can't wait until a baby is born to learn if it's a boy or a girl. Many parents rely on old wives' tales like looking at the shape of the mother's belly or dangling a wedding ring attached to a string over the bump to see which way it swings. These methods have a 50 per cent chance of being right.

There are more accurate ways to determine a baby's gender that can be done at home or at your doctor's office.

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Things you need

  • At-home gender prediction blood test kit
  • At-home gender prediction urine test kit
  • Chorionic villus sample
  • Amniocentesis
  • Ultrasound test

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  1. 1

    Try a home gender prediction kit that tests blood. This test can be performed as early as five weeks after conception. Send a finger-prick sample of the mother's blood to a laboratory for a DNA test. Fetal chromosomes are present in a pregnant woman's blood, so within a couple of weeks you can know if your baby is a boy or a girl. This type of test is 99.9% accurate, although inconclusive results are possible. Home DNA test kits can only be ordered from the manufacturer.

  2. 2

    Learn your baby's gender six weeks after conception with a home gender prediction kit that tests urine. Collect the mother's first urine of the morning and wait ten minutes. The sample will turn yellow or orange for a girl and green for a boy. This type of test is available in many drugstores, and it is about 80% accurate.

  3. 3

    Ask your doctor to take a chorionic villus sample (CVS) after eight weeks of pregnancy, especially if there is any reason to expect chromosomal abnormalities. This is an invasive test that uses samples of placental tissue. Although gender can be determined with 99 per cent accuracy, this procedure has a 4 per cent risk of causing a miscarriage, and there is also a chance of infection or damage to the foetus.

  4. 4

    Get an amniocentesis test done after the ninth week of pregnancy. In this test, the doctor inserts a needle into the mother's uterus to extract an amniotic fluid sample. Parents will have to wait two to four weeks for a result, but the results are 99 per cent accurate. Amniocentesis is generally only done if genetic defects are suspected, and there is a one per cent chance of miscarriage associated with the test. Don't expect your doctor to use amniocentesis just to determine the baby's gender.

  5. 5

    Have your doctor do an ultrasound after the eighteenth week of pregnancy. Ultrasound tests are noninvasive and generally safe. If the baby is turned with its genitals facing the sensor, a skilled doctor can tell you if it's a girl or a boy. It is not possible to estimate the accuracy of an ultrasound at predicting gender, however, because if the baby's position is wrong or the doctor makes a mistake, the gender prediction will be wrong. Be sure to tell your doctor before the ultrasound test whether or not you want to know your baby's gender.

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