As the saying goes: \”Boys are born prematurely and girls are born late\”, are these statements true? There is a folk saying that boys are born early and girls are born late, which means that the expected dates of delivery of boys and girls are different, and boys are generally born In advance, giving birth to a girl is generally postponed. So, is there any scientific basis for this statement? Below, the editor of Babao.com will tell you: How early does it usually take to give birth to a boy?
Are all boys born a few days early?
Are boys born a few days earlier: Although There are not many clinical research data in China, but there are many large-sample studies in Europe and the United States that support this conclusion: whether in premature infants or full-term infants, the shorter the mother\’s pregnancy, the greater the proportion of boys born. high.
Why is it said that boys come earlier and girls come later
People who support this statement believe that expectant mothers who are pregnant with boys have more male hormones in their bodies and develop faster in the mother\’s womb than girls, which can be seen from their weight. Some people also believe that boys are generally more active, so they will come out earlier than girls. However, this has no scientific basis at all and can be used as entertainment to make people laugh. In fact, the sooner or later the fetus is born is related to the estimate of the expected date of delivery, but the estimated date of delivery is not 100% accurate. Not even doctors can calculate the specific time of conception, so how can it be so certain that a boy will be born earlier than a girl will be born later?
Is it accurate to give birth to a boy earlier than the expected date?
Norway One study analyzed birth data for about 1.7 million babies born from 1967 to 1988 and found that among full-term babies born before the due date, the ratio of boys to girls was 1.17; for babies born after the due date, the ratio of boys to girls was 1.17. equal.
A French study on a larger population found that, regardless of whether they were premature or full-term babies, the proportion of male fetuses dropped as the gestation weeks of the pregnant woman increased. Moreover, this changing trend has a
Certain racial specificity is very obvious among white people, but this pattern is not found among black people. However, the sample size of black people collected in this study was small, which may have contributed to the statistical differences.
There are only some studies on premature infants in my country that have found that the proportion of male infants among premature infants is significantly higher than that of female infants, and there is no reliable data analysis on full-term infants. If we really want to do itTo find out whether Chinese babies also have this trend, we have to wait for the results of domestic large-sample population studies.
Why are boys likely to be born early
Some people think that the levels of estrogen and male hormones in men and women are different. , making it possible for boys to develop faster than girls in their mother\’s womb. You should know that the birth weight of a baby is an important indicator of its intrauterine development level.
One of the accurate. Among babies born at term, boys tend to have a heavier birth weight than girls. If you compare the gestation duration of babies with the same birth weight, you will find that: when the birth weight is the same, a boy is born when his mother
Pregnancy length for mothers is usually shorter than for mothers of girls.
How to calculate your due date
This starts with how to calculate your due date. Because the specific binding time of sperm and egg is difficult to judge, clinicians usually use the last To calculate the expected date of delivery, add 9 or subtract 3 from the month of the last menstrual period to determine the number of months of the expected date of delivery; add 7 to the number of days to determine the expected date of delivery.
For example:
If your last menstrual period was December 6, 2016, then the month 12-3=9; the date 6+7 =13; that is, the expected date of delivery is September 13, 2017.
For another example, if your last menstrual period is January 3, 2017, then month 1+9=10; date 3+7=10; that is, the expected date of delivery is October 10, 2017.
Why do some people delay the due date
Scientists have calculated that it is only about 5% of expectant mothers give birth on the day of their due date, and the other 95% give birth approximately 2 weeks before or after the due date.
This is because the expected date of delivery does not take into account the differences in days in different months, and each expectant mother’s age, pregnancy and childbirth history, and menstrual cycle length are also different, and some expectant mothers may even remember it incorrectly. The time of the last menstrual period, these factors will cause a certain error between the expected date of delivery and the actual date of delivery. Therefore, there is advance and delayIt\’s so normal.
Tips
Although according to the current statistics, the probability of a boy arriving early is indeed higher, the statement that boys arrive early and girls arrive later is not reliable, and it is not reliable. Not every pregnant woman can get it. In the final analysis, the saying \”boys come earlier and girls come later\” is still a matter of probability, and expectant mothers should not take it too seriously.
