Influencing male/female ratio

A question from a fellow grower:

I have recently gotten some seeds which are both male and female. My ambition is to produce a variety of seeds from these future plants. I have discussed this with a few friends and actual professionals in the industry and as of now I am still sort of in the dark as to proper technique if there is any. My question then is simple. Is there any specific method of producing a majority of female seeds from the male female plants I now have

Low stress and longer veg will improve your ratios but even long veg is no sure fire way so much of it is simple genetics and though many have said they get higher ratios doing this or that lots of it is speculation and pure dumb luck :slight_smile: