However,
If some families have more:
The researchers started from an observation: they all have a colleague. Therefore, a friend or a family member who had only girls or only boys. For example, Siblings of three. Nevertheless, four children of the same sex that defy probabilities: worldwide, the distribution of sexes at birth is almost equal, with, on average, if some families have more 105 boys per 100 girls in 2020 according to the National Institute of Demographic Studies. How to explain that these statistics are not verifiable on the scale of the couple? This is what a team from Harvard University sought in a study published on July 18 in the journal Science Advances.
The basic scenario is the one following a binomial statistical law: fertilization is related to the launch of a two -sided room. with, each time, a chance in two to obtain the “girl” face and one in two chance of obtaining the “boy” side. The researchers have analyzed another possibility. the beta-binomial law where each person launches a room well, but the latter is unique for each individual: « The part is not weighted in the same way according to your personal features or environmental factors “Explains Siwen Wang, the first author of the study and doctoral if some families have more student at Harvard University. Everyone would therefore have a personal probability of having a girl or a boy, more or less distant from 50 %.
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if some families have more — If some families have more: Newborn in the maternity hospital of a Parisian hospital, June 29, 2022. CHRISTOPHE ARCHAMBAULT/AFP The researchers started from an observation: they all have a colleague. a friend or a family member who h.
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