Yes it is true that clomid can have a slight lean for a girl, I believe the rate is about 3% sway for a girl. Noone really knows why. However do a google search as there is plenty of information about this and you will see just how many people reply who have had all boys whilst on clomid.
Clomid is a pretty serious medication, and I personally would never request it just for a girl sway. It certainly is in no way a strong sway for a girl, and it has side effects which can be quite severe in some people, myself included. IMO, stick with the IG diet and supps and your 7 sway factors!
HTH and GL 
Mum to
and a precious
due in April 2010!
Thankyou to all the wonderful ladies at IG for all your support!