In fact, having a boy was so important to Taylor, who has a degree in Microbiology, Immunology, and Molecular Genetics from UCLA, that she started researching what variables affect whether an X or Y sperm fertilizes an egg. She remembers rushing home from work each day to spend her free time obsessively scouring databases for scientific journal papers on the topic. It took her about seven months of digging to piece together her own method, one that she believes is better, easier to understand and implement, and works more successfully than anything else out there. After she had her pre-planned boy in 2012, followed...