Implantation Dip?

Sarah • ♥️ IJH 3/21/19 ♥️ IVF #1 - MC 12/23 ♥️ IVF #2 - BFN ♥️IVF #3 - MC 9/24 ♥️ Sarah Harris Vlogs on YouTube ♥️

My chart is attached & I was wondering if anyone would mind looking at it. Could that be an implantation dip on CD 27? Thanks!