Perhaps schizophrenia is inherited, and schizophrenics happen to not mind having sex regardless of oppressive heat and humidity more than other people.
Maybe the number of schizophrenics born is constant each month, but they are a larger percentage of the smaller number of people born in the spring.
Managed to track down something that gave months of birth for Australia:
2000
Month
… …
January …21 145
February …19 843
March …21 843
April …20 184
May …21 388
June …20 479
July …20 561
August …21 412
September …21 362
October …21 888
Novemenber .19 938
December …19 593
However, that data doesn’t show the fact that there are significant fluctuations between the years. Most years March is the peak month for childbirth but in some years its September or October.
The only thing that seems to be true all the time is that Dec & Feb are the lowest months for childbirth, which sort of makes sense - most women wouldn’t want to be 8-9 months pregnant in the middle of an Australian summer so they might plan around it.
WV_Woman - Um, no. I didn’t have direct access to it and I didn’t want to explain to anyone else why I wanted to run a frivolous query. I might be able to convince a buddy of mine in marketing to run it when he’s got nothing else to do but that may take some time. I’ll post here if I find out.