RD_ttc 6 years ago
Chances are low since you will ovulate 24 - 48 hours after a positive OPK.. so if you got a positive on CD 15, then ovulation is likely to occur on CD16 or CD17. Sperm can live upto 5 days inside the uterus but you can increase your chances by BD'ng today and tomorrow (CD15 and CD16)
