Ok Tamara, I had a look at all of your links (well, the ones that worked anyways)...and its true *some* of the studies would credit a sway factor (diet, pH, etc) for influencing the gender ratio by 2-10%...what I would like to know is what gave you the notion that these "effects" are cummulative in any way.
THERE IS NO STUDY TO SUGGEST CUMMULATIVE EFFECTS!
You cannot take a 10% diet study and add it to a 5% pH study and a 5% clomid study and say that diet, pH and clomid combined is 20%. In fact, if anything, all factors combined probably have a negative effect since the body works towards equilibrium (the same way too much vinegar will INCREASE vaginal pH).