As per the studies, if you don’t have an idea if your upcoming bundle of joy is a girl or a boy, the odds are mostly in favor of you expecting of having a baby boy since 51% of the newborns in the United States are boys, and researchers have recently come to understand why this is.
Researchers think they may have finally figured out why there are more newborn boys than newborn girls in the United States each year.
It has been widely thought for a long time that the imbalance that results in more boys being conceived than females is the root cause of the fact that 51% of babies born in the United States are male. This opinion is based on the observation that more men than girls are conceived. Nevertheless, according to Steven Orzack, a biologist at the Fresh Pond Research Institute in Cambridge, Massachusetts, who has been conducting research on the birth-sex ratio, no concrete evidence supports this theory.
Together with other scientists and researchers from Harvard, Oxford, and Genzyme Genetics, Orzack gathered data from 140,000 embryos created in fertility clinics, 900,000 samples from fetal screening tests such as amniocentesis, and 30 million records from abortions, miscarriages, and live births, the majority of which came from the United States of America and Canada.
According to their research findings, which were presented in a paper presented at the Proceedings of the National Academy of Sciences, there is no evidence that more boys than girls are being conceived. At the time of conception, there are approximately an equal number of boys and females: fifty percent of each.
How is it, then, that more boys are being born than girls?
Instead, it would appear that the skewed sex ratio is a result of what happens during pregnancy. The researchers discovered that even though more male embryos died in the very first week of gestation, possibly as a result of severe chromosomal abnormalities, there was a higher rate of female mortality later in pregnancy. This was the case despite more male embryos dying in the first week of gestation.
It was previously believed that male fetuses were more vulnerable than their female counterparts; however, the study also debunked that assumption. According to Orzack, these long-standing beliefs regarding gender distribution were not supported by substantial evidence. Orzack states that the findings are 180 percent different from what experts have believed for a considerable time.
If you’re a betting woman on your way to a gender reveal party, the chances are good that you’ll be seeing blue. But, the information that was gleaned from the study has more to offer the scientific community than just knowledge on sex: It’s a bit more knowledge about what’s going on with the developing embryo in the early stages of pregnancy, which is a period of time that science doesn’t really comprehend yet.