My mother says a woman can increase her chances of a boy or girl if she makes her blood more alkaline or acid by diet before conception? true?

50% right: There are plenty of myths about predicting a babies sex and this is one of them.A string test, how they are positioned, cravings,etc, are still all myths. They are right 50% of the time which is better than your lottery numbers, people seem to selectively forget the 50% of time they are wrong.An ultrasound will give reasonably accurate information in late pregnancy.