There are some web sites where you cannot speak to anyone. Others do not have a company or a person behind the web site and the payment goes to web site paying agency which has not issued any of the information or promises. Most web sites do not have any evidence of biological research and quote the moon cycle or biorythms and therefore join the "old wive's tales" category!
Some methods rightly refer to the importance of the acidic or alkiline ph environement. But then they limit this importance to the vagina and not the actual egg. The latter does reject the the sperm if both are the same ph or accepts the sperm if there is a power charge created by the opposite polarities, but the vagina environement is not relevant!
Well known methods of baby gender selectionMicrosort - Ericsson - Embryo selection : Sperm sort is still difficult and expensive. read more details
Timing method - Shettles method:No measured success rate and an unlikely theory.
The most read about method is the "Timing Method" which was developed by a Doctor Shettles and called the Shettles method. There is no register of users so there is no possibility of measuring the success rate. Parents are asked to try for boys during ovulation and girls 3 days before ovulation.
It is wrongly assumed that the Y chromosome (boy) provides a lighter sperm which races to the egg faster than the heavier X sperm. As we explained the difference in weight or size is negligible and the speed of delivery of thousands of sperm in a small space does not allow for these ideologistic theories. It is not a credible situation.
Sperm rarely remains fertile for more than 2 days, so users cannot easily be blessed with girls or even a baby if the only time to try is "3 days prior" to ovulation! It would create much stress as mothers who today mostly want a little girl would have great problems in the difficult task of predicting a future ovulation to the exact day. Boys are made on day of ovulation or day before and so are girls!
The method has popular appeal and is well introduced by hundreds of existing fertility service companies specialising in selling various kits such as ovulation predictors. They have no idea who uses the calendar for gender selection. And the results. Dr Shettles finally advised different diets for each gender as well and he was right to do so as the "race" idea is not a biological solution.
Dr Shettles, criticised as he was for his non biological assumptions, did however publicly engender the idea that parents should have a right to try to choose their ideal family. "To quote a couple of reviews, (there are many) RH Gray, in a 1991 article in American Journal of Obstetrics and Gynaecology says that the Shettles method is contradicted by scientific data. Finally, in a 1995 study published in the New England Journal of Medicine, researchers Allen Wilcox, Clarice Weinberg and Donna Baird say that "the timing of sexual intercourse in relation to ovulation has no bearing on the sex of the baby".
Dieting: Farmers used it with a reasonable success rate.
BabyByGender based on Selnas - other pH methods: Follows nature's way with a measured success rate. read more details
Other theories: Chinese calendar is not used by Chinese people; sexual positions does not help biological process. Jonas method's theory is not logical. FortuneBaby read more details
I will be happy to discuss my personal views on gender selection with you apart, of course, from repeating the above information. Just contact us.
All the best!