Changes after baby

Has anyone else notice major changes (besides the obvious physical changes) after having their baby?

I noticed some light spotting today and thought it weird since its mid-cycle for me so i took an ovulation test out of curiosity.

Spotting and positive LH test, i think its safe to say im ovulating.

Funny thing is that i was never able to pinpoint ovulation like this before baby. Just interesting. Curious to see if anyone else has noticed changes post baby like this?