When to use Preseed

Jennifer • Military wife🇺🇸 currently pregnant with a little boy💙 due in December🎄
Hello ladies I have recently purchased preseed and I'm not sure if I should be using it in the days leading up to ovulation or if I should wait to use it when I get a positive ovulation test? Anyone had success with preseed? I've been TTC for 8 months now hoping it will help!