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. read more details
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!