Determining fetal sex at 16 weeks. Will the gender ultrasound be accurate at 16 weeks?.



Determining fetal sex at 16 weeks

Determining fetal sex at 16 weeks

The purpose of this study was to determine the accuracy of sonographer predictions of fetal gender during routine ultrasounds. Primarily, the study sought to investigate the accuracy of predictions made in the first trimester, as requests from parents wanting to know the gender of their fetus at this early scan are becoming increasingly common. Second and third trimester fetuses were included in the study to confirm the accuracy of later predictions. In addition, the mother's decision to know the gender was recorded to determine the prevalence of women wanting prenatal predictions.

A prospective, cross sectional study was conducted in a specialist private obstetric practice in the Illawarra, NSW. A total of fetuses across three trimesters were examined collectively by seven sonographers. Fetal gender was predicted using the sagittal plane only in the first trimester and either the sagittal or transverse plane in later trimesters. Phenotypic gender confirmation was obtained from hospital records or direct telephone contact with women postnatally.

Male fetuses under 13 weeks were more likely to have gender incorrectly or unable to be assigned. After 13 weeks, success rates for correctly predicting males exceeded that of female fetuses. Statistical differences were noted in the success rates of individual sonographers.

Sixty seven percent of women were in favour of knowing fetal gender from ultrasound. Publicly insured women were more likely to request gender disclosure than privately insured women. Sonographic gender determination provides high success rates in the first trimester.

Results vary depending on sonographer experience, fetal age and fetal gender. Practice guidelines regarding gender disclosure should be developed. Predictions prior to 12 weeks should be discouraged. The value of ultrasound screening in detecting and monitoring fetal malformation, placental position and multiple pregnancies is undeniable 2.

Most commonly gender predictions are made in the second or third trimester, however with improvements in ultrasound technology 4 identification of fetal gender in the first trimester is becoming a reality. The study conducted by Emerson et al. This study found that a focal bulge creating a cranial acute angle indicated male genitalia, while a bulge creating a caudal acute angle indicated female genitalia 3 Figure 1.

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16 Week Ultrasound / Gender Determination



Determining fetal sex at 16 weeks

The purpose of this study was to determine the accuracy of sonographer predictions of fetal gender during routine ultrasounds. Primarily, the study sought to investigate the accuracy of predictions made in the first trimester, as requests from parents wanting to know the gender of their fetus at this early scan are becoming increasingly common.

Second and third trimester fetuses were included in the study to confirm the accuracy of later predictions. In addition, the mother's decision to know the gender was recorded to determine the prevalence of women wanting prenatal predictions. A prospective, cross sectional study was conducted in a specialist private obstetric practice in the Illawarra, NSW. A total of fetuses across three trimesters were examined collectively by seven sonographers.

Fetal gender was predicted using the sagittal plane only in the first trimester and either the sagittal or transverse plane in later trimesters. Phenotypic gender confirmation was obtained from hospital records or direct telephone contact with women postnatally. Male fetuses under 13 weeks were more likely to have gender incorrectly or unable to be assigned.

After 13 weeks, success rates for correctly predicting males exceeded that of female fetuses. Statistical differences were noted in the success rates of individual sonographers. Sixty seven percent of women were in favour of knowing fetal gender from ultrasound. Publicly insured women were more likely to request gender disclosure than privately insured women. Sonographic gender determination provides high success rates in the first trimester.

Results vary depending on sonographer experience, fetal age and fetal gender. Practice guidelines regarding gender disclosure should be developed. Predictions prior to 12 weeks should be discouraged.

The value of ultrasound screening in detecting and monitoring fetal malformation, placental position and multiple pregnancies is undeniable 2. Most commonly gender predictions are made in the second or third trimester, however with improvements in ultrasound technology 4 identification of fetal gender in the first trimester is becoming a reality. The study conducted by Emerson et al.

This study found that a focal bulge creating a cranial acute angle indicated male genitalia, while a bulge creating a caudal acute angle indicated female genitalia 3 Figure 1.

Determining fetal sex at 16 weeks

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4 Comments

  1. Results vary depending on sonographer experience, fetal age and fetal gender. This study found that a focal bulge creating a cranial acute angle indicated male genitalia, while a bulge creating a caudal acute angle indicated female genitalia 3 Figure 1.

  2. This test isn't without risk, however, and isn't performed simply to determine the sex of your baby. Publicly insured women were more likely to request gender disclosure than privately insured women.

  3. A total of fetuses across three trimesters were examined collectively by seven sonographers. Sonographic gender determination provides high success rates in the first trimester. Sixty seven percent of women were in favour of knowing fetal gender from ultrasound.

  4. Still others use a "pendulum test" in which an object is suspended over the pregnant belly and the baby's sex is revealed depending on which way the pendulum swings. Some people claim they can predict the baby's sex by the way you're carrying, but, again, there is no scientific proof that this is true. The test, usually given to moms 35 or older, involves inserting a needle into the uterus to remove a small amount of amniotic fluid.

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