ofta har jag hört när äldra personer sitter och pratar att efterkriget så föddes det mer pojkar än flickor. till och med att dom säger 90/10%,, men det låter galet.
jag tyckte det lät "över" övernaturligt såna fall ,
jag har hört att både kvinnor och män som haft längre perioder utan sex har dramatisk större chanc att få en pojk då dom blir gravid ( typ ett halvår eller mer) , men det har jag inte hittat nå direkt fakta på
jag har kollat up litte på google och talat med många personer om detta.
har hittat mycket fakta att det var mer barn som föddes men att just att det var mer män som föddes har jag inte hittat nå stora siffror på
runt 52män/48kvinnor på 100 under 60 , 90 talet i danmark t,ex
men just presic efter kriget och i europa där dom flesta dog har jag inte så mycket på,
hade hoppats om nån visste nånting eller om det redan finns en tråd om detta tema / som skulle kunna hjälpa mig , om det faktiskt var så att det var enorm mer pojkar än flickor? om det var så finns det nå förklaringar ?. är min fråga
http://www.scb.se/statistik/BE/BE0701/2 ... 205_04.pdf
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"From 1945 to 1970 there was a significant baby boom, as there was after the First World War. In fact there were two booms – a short one straight after World War II, with a peak in 1947; and another longer one from the mid 1950s to 1970, peaking in 1964, as post-war austerity gave way to rising affluence. In the two peak years, births exceeded one million. The coming together of the blue and grey lines in the above chart reflects the decline in child mortality." källa: http://www.tomorrowproject.net/pub/1__G ... /-544.html
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"In many countries, the male:female ratio at birth has varied significantly over the past century, but the reasons for these changes have been unclear. The authors observed a close parallel between decreasing family size and declining male:female sex ratio in Denmark from 1960 to 1994. To explain this finding, they examined the sex ratio and birth order of 1,403,021 children born to 700,030 couples. Overall, 51.2% of the first births were male. However, families with boys were significantly more likely than expected to have another boy (biologic heterogeneity). By the fourth birth to families with three prior boys, 52.4% were male. The increase varied directly with the number of prior boys (p for trend = 0.0007). Furthermore, couples with boys were more likely to continue to have children. In summary, the authors found that the declining male:female ratio in Denmark and probably other European populations is mainly attributable to three effects: declining family size, biologic heterogeneity, and child sex preference. Why families with boys are more likely to have additional boys is unknown"
// john alexander hedblom
