Firstborns are more intelligent!!

Eldest children are more likely to be intelligent than their younger siblings, according to a study. Eldest children have IQs 2 to 3 points greater than younger siblings', and the reason is not genetics, but the way their parents treat them, according to the study published in the latest issue of the journal Science researchers at the University of Oslo collected data from 2,40, 000 Norwegian men and found that firstborns had an average IQ of 103.2, about 2 points higher than second-born males and about 3 points higher than men born third.

The researchers surmised that older children are showered with attention early in life and treated as leaders in the family. They are handed more responsibility after younger siblings are born and live with higher expectations from their parents.

Another reason thought by me could be that the intelligence of a child is directly proportional to certain hormones he is exposed to in the mother's womb.So it may be that firstborns receive more of those hormones. This logic is not completely wrong as it has been found already that the brain development of a child can be influenced in the mother's womb itself by some omega oils (found in fish fat).