Supposedly you are more likely to have a boy if you have sex only once during your fertile period and a girl if you have sex more often.
Girls:
female sperm live longer and swim slower than male sperm. If you have sex a few days before you ovulate the longer living and slower female sperm will be waiting for the egg.
Boys:
Boy sperm swim faster to your egg and then die off quickly....always a competition with men, and then they just give up....am I right ladies??? LOL
So if you want to have a boy you need to fertilize the egg DURING ovulation....and its best if you have the hubs build up if you know what I mean....
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Ovulation- is usually only about 12 to 24 hours- during which the egg is viable, or open for the business of fertilization. Most often occurs halfway through your menstrual cycle — the average cycle lasts 28 days, counting from the first day of one period (day one) to the first day of the next period. But as with everything pregnancy-related, there's a wide range of normal here (anywhere from 23 to 35 days), and your own cycle may vary slightly from month to month.
BTW- They have ovulation predictor kits
