We need to keep in mind that we are all hatching too few to represent a statistically accurate sample size from which to draw conclusions. While the results we see with small numbers may lend itself to a conclusion that ACV helps produce larger quantities of female offspring, Matt's analogy is dead on. IF ACV produces a larger quantity of female offspring, then why don't the large/production hatcheries invoke this practice? Same for commercial poultry applications for egg laying operations??There's no scientific evidence to back this up. It's a placebo effect. Sorry to break it to you. It will have plenty of positive effects (improved digestion, alters pH of intestinal tract and makes it less hospitable to parasites being chief among them) but controlling the gender of offspring is not one of them.
Edit: Put another way, if there was an actual way to do this, especially as cheaply as that it would be widely used in hatcheries and well, pretty much everywhere.
I don't mean to be contrary....if it works for you, then by all means employ it. However, from a strictly scientific basis (my undergrad is in engineering so I tend to be a little this way, sorry), the statistical result from a small sample size leaves too much room for inaccurate interpretation of the data
Time for coffee....sorry to have gotten on a soapbox this early on a Saturday
