The Hungarian researchers believe those born in summer are more prone to mood swings or disorders. Supposedly, those born in autumn are less likely to be depressive and those born in winter less likely to be irritable. One of the researchers is quoted as follows:
Biochemical studies have shown that the season in which you are born has an influence on certain monoamine neurotransmitters, such as dopamine and serotonin, which is detectable even in adult life. This led us to believe that birth season may have a longer-lasting effect.This feels a bit like astrology, the totally debunked "what is your sign?" nonsense. I'm uncertain these findings are valid; let's see if they can be replicated before getting serious about them.
If the findings prove to be true, it would certainly be an argument for planning time-of-birth to avoid summer, thus avoiding autumn conception.