Shettles Method is still a hypothesis and has not been totally accepted but I am a strong supporter of his observations. Because, I have tested it and it's working. Since 2013, I have assisted not less than 200 couples within my locality. The procedure is natural and nothing invasive. You can Google biography of Dr Shettles and find out his many accomplishments. Shettles himself demonstrated this concept; he has 6 children; 3 boys and 3 girls. Lots of success stories bro