Gender determination is usually highly accurate Gender predictions made by ultrasound have an accuracy rate "north of 90 percent," Carr said. However, "more and more people are telling us they want to wait until the baby arrives to find out the sex," Carr said. Another test that can look at the baby's chromosomes is called CVS chorionic villus sampling , which is performed during the first trimester to look for problems with the baby's chromosomes. But he warned there's not a hard and fast relationship between morning sickness and fetal sex. The sex of the baby is determined by the sperm cell that fertilizes the egg first. Women carrying girls have higher levels of the pregnancy hormone hCG human chorionic gonadotropin , and these higher levels are associated with an increased risk of severe morning sickness, Carr said. Unfortunately, for anyone who has wanted to actually find out what sex their baby is, none of these old wives tales or gender predictors have any bearing in reality whatsoever. Ultrasound scans finally made it possible to see whether you were having a girl or a boy.
To fill the void, people may turn to some of the following six old wives' tales to predict whether the fetus is a boy or girl. The position of the baby during the ultrasound is key, and if your baby's curled up or facing the wrong way, you may have to wait until your next appointment. Whether a baby will be a boy or a girl is determined at the time of conception, long before most women even realize they are pregnant. If it swings in a circle, the child is thought to be a girl. But he warned there's not a hard and fast relationship between morning sickness and fetal sex. Beyond this point, noticeable anatomical differences in the genitals can show up on the scan. It's typically during the second ultrasound that parents can learn the sex of the baby. When you go in for your scan, ask your sonographer to get a shot exactly like one of the ones above- the foetus right side on, back flat not curled up and a good shot of the 'nub'. Also, it must be side on and apparently, it is better if the foetus is right side up. Some parents-to-be can't wait to find out whether they're having a boy or a girl, while others choose to put off knowing the sex until birth. This site has photographs showing the differences between the genitals and includes examples of ultrasound images. Expectant parents who want their child's sex to remain a secret until birth are in the minority, said Dr. Still, Carr cautioned that although researchers may find this association holds true over an average of 1, babies studied, an individual baby boy could still have a faster heartbeat, and an individual baby girl could have a slower one. And the technicians may have limited medical training to interpret the scans, he noted. The procedure is tightly regulated when it occurs in a hospital or medical clinic, he added. Am I Having a Boy or Girl? Women may be asked to drink several glasses of water before an ultrasound because a filled bladder helps give clearer images. But by the third trimester, a girl's heartbeat tends to be a little faster and a boy's a little slower, he said. Ultrasounds were not designed for sex prediction. To try this old favorite, a woman ties her wedding band to a string and hangs it over her pregnant belly to guess the baby's gender. Early in pregnancy, there is no difference in heart rate between the sexes, Carr said. Another theory holds that a mother's food cravings during pregnancy may reveal the baby's sex, with sweet cravings signifying a girl and cravings for salty, sour or odd foods linked with a boy. The egg always contributes an X chromosome, and the sperm can contribute either an X or a Y chromosome, depending on the sperm cell. If you've already had your scan and the nub is visible, but you can't work out if it's a boy or a girl, why not go to the In Gender Forum where you can post up your scan on the boards and get members to have a look and make their predictions. 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.
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