Ok. here is the drano test...u mix a pregnant womans urine with drano cleaner and depending on how it changes its determines the sex..of course this is a urban legend.
It is no more accurate then spinning a needle on a thread over your belly and so on,
Noone take me seriously! yes. I have done it though,...like juliet, with my first pregnancy I was dying to know but didn't want a sono-I did every wifes tail out there.
I did wear a face mask doing this obscene test.
Urban legend or not..years ago my drano test was accurate...
here is the link on pregnancy urban legends

http://www.snopes.com/pregnant/drano.asp