read the pack.. it will tell you when your fertile days are.. so have sex on those days as much as you can... then it will tell you your peak fertile day && really have alotta sex lol... I used it && got pregg on 1st try... when it told me I was at my peak moment I had sex like 3 times that day... then I let the sperm sit in my vajay 15 min... && elevated my pelvis!