There are all these theories that supposedly will influence one gender or the other.
However, i heard a discussion of this on the radio where a fertility expert ran through a list of scientific tests- all of which failed!! Even the one i would have though was foolproof: girlsperm are heavier and slower than boy sperm. the sperm was separated (in one of those spin thingies) and the girlsperm sunk to the bottom and the boysperm was on top. It failed spectacularly also!!!
Having said that, i would like a girl too..
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