Why The Sex You Have Today Could Influence Or Determine The Gender Of Your Baby Tomorrow
At the heart of all gender selection methods is the fact the sperm which produce a boy infant and the sperm which produce a girl infant are noticeably different in a lab. Boy sperm are super fast, but this speed contributes to them burning out and dying off quicker. Although they will win a race if all things are equal, their weakness keeps this from actually being the case. They are swayed and weakened as soon as they hit your vagina because acidity is extremely detrimental to them and because they are so short lived, time is not their friend either. 
The girl producing sperm on the other hand are just the opposite. They are slow, but strong. They can thrive and live just fine in your vagina because acidity doesn't bother them. They also have time on their side, as they can live for days longer than the boys.
Timing Sex / Intercourse
To Correspond With Ovulation (Depending On The Gender That You Want) Most people realize that there are certain times in the month when a woman is more likely to become pregnant. But, if you are dead set on one gender over another, you'll have to do better than this.
A woman's fertility window generally runs for about five days (up to three days before you ovulate and the day of and after ovulation.) If you want a girl infant, then you want to be on the front end of the window. The girl sperm have no problem hanging out waiting to meet your egg. Boy sperm will usually die off within this time frame. If you want a boy infant, you need to wait til the end of the window. If you go earlier than this, your boys will be weak and can't use their speed. Basically, these little guys have a very short life span so timing is vital.
And, you can't ignore precision accuracy here. You should not guess as to when you actually ovulate or assume that you ovulate precisely midway through your cycle. I recommend finding a good saliva or urine ovulation predictor so that you don't have to guess. These gadget use changes in your bodily fluids to tell you when ovulation is approaching and has occurred.
Sexual Positions And Baby Gender The intercourse positions that you use follow the same idea as timing. If you want a girl, you want to expose the boy sperm to your acidic vaginal tract for as long as you can. If you want a boy, you need the shortest, least traumatic trip that you can manage. Deep penetration is best for this goal.
You can lower your vaginal PH if you want a boy and raise it if you want a girl. This is done through douching and / or diet and you can monitor your progress using PH testing strips.
I've put together a few websites that take a lot of the guess work out of choosing your baby's gender. You'll find step by step instructions, resources for douche recipes and food PH lists, tips, support, and examples of ovulation predictors / PH testing strips.
