This is probably a super basic question but I'm scratching my head trying to figure it out.

First, I see my LTR about 50% of the time due to our custody schedules-- when we both have kids, we might manage to snatch a lunch date or cup of coffee, but no sleepovers. It is a challenge sometimes to assess her day-to-day moods when I don't see her every day and we're communicating via phone or text.

Second, she uses https://en.wikipedia.org/wiki/Contraceptive_vaginal_ring. It suppresses her periods. This is good (no shark week!) but also bad (no telltale evidence for me to use to track her). I've read that Norplant and some other similar contraceptives have similar effects.

Her moods seem to be pretty stable day-to-day throughout the month but maybe I am missing more subtle cues since I don't see her every day. For those of you whose wives or LTRs are using a contraceptive like this, what do you track to know when she's ovulating, etc?