I have it in my mind that this phenomenon was an organic reaction to the large scale loss of males from the human population but I can't find any specific research to back this up.
2006-09-11 00:41:31 · 5 answers · asked by Liam G 1 in Social Science ➔ Sociology
The male to female birth ratio is determined by biology, not historic events or social trends (with the exception of aborting fetuses because of their sex, which was not a factor after WW II).
For every 100 XX inseminations, there are about 136 XY inseminations. (XX is the beginning of a female; XY is the beginning of a male.) The reason is that the Y chromosome is lighter and smaller than the X chromosome. So, it actually "swims" faster, thereby having a better chance to enter the nucleus of the ovum (egg).
Once a sperm has entered the nucleus, all other sperm within the egg are killed off, and no other sperm can enter.
Now, of those 136 XY chromosome pairs, 30 will result in spontaneous abortion (or miscarriage). So, at this point, the ratio is 106 XY's to 100 XX's.
Boy babies are not as strong as girl babies and are more likely to die of various conditions and diseases. Also, little boys are more prone to morbid accidents.
So, by about the time of puberty, there are roughly 100 males to every 100 females. In evolutionary terms, this may account for the fact that monogamy is the most common form of marriage.
2006-09-11 05:40:14 · answer #1 · answered by Goethe 4 · 0⤊ 0⤋
No. there was a lack of males, but the females mated with the males available and had a normal male to female ratio of births.There is no proof that there were too many females in the 60's which is the genereation that came from this
2006-09-11 02:23:15 · answer #2 · answered by livachic2005 4 · 0⤊ 0⤋
No, the infant mortality rate went down. An average of 2-3 ratio on male to female birth is pretty normal. Since more males are born each year more male children die of SIDS (Sudden Infant Death Syndrome--commonly called Crib Death). As infant mortality rates decrease, more males grow up
2006-09-11 00:51:00 · answer #3 · answered by Theresa 4 · 0⤊ 0⤋
No. Since I happen to be one of those Baby Boomer babies, I specifically remember that there was speculation that more girls were actually being born for a few years. This ended up being erroneous.
2006-09-11 00:47:25 · answer #4 · answered by Anonymous · 0⤊ 0⤋
no
2006-09-11 00:47:48 · answer #5 · answered by linesh r 2 · 0⤊ 0⤋