Extensive research has been carried out by various doctors and numerous studies have been documented on the timing, positions and frequency of intercourse for gender selection with claims of between 75% to 80% success. Dr L. B. Shettles claims that intercourse relative to ovulation can increase the odds of conceiving a particular sex.
We place very little weight on the timing of intercourse relative to ovulation based on several reports detailed below, and would not recommend that you try to sway the odds by timing alone. Timing, position and frequency of intercourse may be included to increase the odds in your favor.
If you would like to use the timing methods listed below I URGE YOU to follow the other methods as well.
Recently published data implies that the timing method may be no better than Mother Nature at conceiving the preferred gender.
In 1984, the World Health Organization published a study that failed to confirm gender predominance when timing conception relative to ovulation.
A 1992 New Zealand study also failed to confirm Dr Shettles theory (which is based on timing intercourse).
In 1995 an English study failed to find any link with timed intercourse relative to ovulation - in gender selection.
In 1997 an Israel study on preselection methods concluded that the timing method played no significant part in gender selection.
RH. Gray from Johns Hopkins University, Baltimore states that the statistics from 6 studies concluded that fewer males were conceived at the time of a womans most fertile period which is in direct conflict to Dr Shettles method.
Timing intercourse for gender selection is based on the life and mobility of sperm, it has been recognised that the male producing sperm are stronger and faster but do not survive for very long, and they prefer an alkaline environment. Female producing sperm on the other hand are slower but have greater staying power, consequently a longer life span, and they prefer an acidic environment.
Intercourse position is also based on the mobility of sperm, with shallow penetration (missionary position) favouring the conception of a baby girl, with deep penetration (rear entry) favouring the conception of a baby boy.
Frequency of intercourse for gender selection is based on the theory that a low sperm count is favourable for the conception of a baby girl, with the idea that the least amount of sperm present, the higher the likelihood that female producing sperm will fertilise the egg, provided that intercourse occurs at least two days prior to mid cycle ovulation. Male producing sperm are more likely to successfully fertilize the egg when the males' sperm count is high, and vice versa.
Timing intercourse relative to ovulation cannot change the pH of the follicular fluid cervical mucus and reproductive tract even with orgasm and if your follicular fluid is acidic at the time of ovulation you will most likely conceive a baby girl and vice versa so it is very important that you only make your conception attempt when chances are 90% or higher in favor of your preferred sex baby (according to the Mid-cycle ovulation Gender Predictor ) to ensure that you have done everything you could possibly do to help sway the odds.