Implantation

Katelyn
My husband and I are currently trying to get pregnant with our second child. Our first is 3 and he is the light of my life but wasn't in any way planned! I had a few questions I didn't have to worry about with him:
How many days past ovulation does implantation occur?
How do you count you DPO?
What's the soonest you've tested and received a positive?