Understand why more boys are born than girls, but women later outnumber men

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There is no conclusive answer, but a study shows that male fetuses are more ‘resistant’ than female fetuses and, therefore, boys are the majority at birth. Census shows Brazil more aged than ever; women are the majority Tânia Rêgo/Agência Brasil dMore boys are born than girls, but later, throughout life, this is reversed and a More boys are born than girls, but later, throughout life, this is reversed and the population of Women in Brazil outnumber men, as shown by data from the 2022 Census, released on Friday (27), by the Brazilian Institute of Geography and Statistics (IBGE). But why are more male babies born? 👉 Science still does not have a conclusive answer, but some theories try to explain the phenomenon, which is worldwide and has persisted for decades. One of them is that male fetuses tend to be more “resistant” than female fetuses and, therefore, boys are the majority at birth. (Understand more below.) However, over the years, men, especially in their youth, die more because of external factors, such as accidents and violence. For this reason, from the age of 24, the female population in the country becomes the majority: there are 94.2 men for every 100 women. What happens during pregnancy The Y and X chromosomal variation present in sperm, which defines the sex of the babies, exists in equal proportion. In other words, the chances of a man or a woman being conceived are the same. 🧬 Therefore, the reason why more boys than girls are born may be what happens in the womb. 🔎 Research by the North American institute Fresh Pond, in which researchers from Harvard University, in the USA, and Oxford, England, participated, analyzed 140,000 embryos created in fertility clinics, 900,000 blood samples, including liquid amniotic, and 30 million records of births and abortions, mainly from the USA and Canada. The study is one of the most comprehensive in the world and the first to include an extensive database, with information on different stages of the embryo, to estimate the sex ratio from conception to birth. Research has indicated that during pregnancy, female babies have a higher fetal mortality rate than male babies. In other words, female fetuses die more during pregnancy, which would explain why more boys are born than girls. “The impartial sex ratio of fetuses at conception, the increase in female mortality in the first trimester and the higher total mortality during pregnancy among female babies are fundamental to understanding human development”, says an excerpt from the study. ⚡ Scientists, however, cannot say exactly what causes this. In Brazil, the latest IBGE survey that provides birth data is from 2021 and shows that, in that year, 1,348,321 men and 1,287,204 women were born. In other words, 5% more men were born than women. 🚨 It’s important to remember that it’s a myth that the moment of sexual intercourse or position can influence the baby’s sex. As we said, the proportion between men and women is the same and there is no scientific evidence that could favor men or women in this race. If more men are born, why are women the majority? According to IBGE data, in the age group up to 24 years old, men are still the majority of the population. From this age onwards, women are ahead, according to the following numbers: 1,537,488 men 1,546,442 women What explains this change is the fact that, as the years go by, more men die than women, especially in youth . A study published by IBGE in 2018 showed that the chance of a man dying between the ages of 20 and 24 is 11 times greater than that of a woman in the same age group. According to several studies, the main causes of death among young men and adults are related to accidents, violence and risky behaviors such as smoking, excessive alcohol consumption, among other causes. g1 Census 2022:Older and more feminine Brazil

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