Ok, so I have read several articles online about TTC for a girl. Example: actively trying on the last day of your period because female sperm have a higher longevity than male sperm. I have known a few  people to try these specific positions and it has worked. I am an educated biology major on my way to medical school, however I have not done research in fertility, other than online articles. I am simply wondering what the odds were when people plan this way. Let me know if any of you ladies have done this and what your outcomes were!