Glo gave me a fertile window starting tomorrow, but my Clear blue ovulation test showed a surge this morning. When I entered the info into Glo, it completely changed my window. My husband is on night shifts but luckily we managed to bd when he got home this morning. As we thought ovulation day was much later this week, and he's tired from shift working, we haven't bd-ed as much as we would have liked to. I know we bd-ed this morning at peak surge, but is there any truth to clearing out old swimmers to get to the quality sperm? We last bd-ed 4 days ago