Does implantation happen on the day of the dip?

[rustyswife828]

So I had a huge dip on 7DPO followed by a huge rise..

I'm on 9DPO and I'm feeling sudden sharp cramps that last for a few secs. They come and go...

Could that be implantation?

Does implantation happen the day of the implantation dip?

 

[BeachyFeelin]

From everything I read having a dip in your chart does not mean it was implantation related. Many women get a dip and AF arrives. I've had a dip in a couple cycles and have never gotten a BFP.

From FF:

"When you see a mid-luteal phase dip on your chart, however, it does not necessarily mean that you are pregnant. Likewise, you do not have to see this pattern to be pregnant"