I want to start a thread looking at what different women experience regarding insulin sensitivity changes during cycle restart (i.e from PMS through to the start of the next cycle).
Some women state they experience no insulin sensitivity change at all. Others experience major changes. I’m sure there is a lot of room in between the two ends of the spectrum to include women who really do experience some level of sensitivity changes, but may not notice it due to the many layers of “what’s causing what” with blood sugar issues…or it’s so minor as not to be noticed because it could be chalked up to any kind of anomaly.
For me, I tend to see highest insulin resistance on Day 23 of my cycle. I experience decreasing resistance from Day 23 through the end of PMS. Sometimes, as occurred last night, I experience my extreme insulin sensitivity a day or two prior to my next cycle starting. I am still in what would be considered “PMS” and have swung from +10%, to +0%, to -10% basal in the last three days. Attached is my Dexcom graph and annotations. I use this as my example because there were minimal variables impacting my numbers.
In a nutshell, I ate dinner at 5:30PM and was conservative with my pre-bolus because I had noticed increased insulin sensitivity throughout the day. I spiked higher than I wanted to, but saw where it rested and conservatively corrected with half of my normal correction dose. Then my bg slid and slid and slid. The rest is noted on the picture. I have mentioned shower drops before…but I typically only notice those with IOB (i.e. basal is not enough to drop me when combined with a shower). I had virtually no IOB last night and my shower dropped me 40+ points per fingerstick, indicating too much basal. These sorts of events are what I see when I experience “The Drop” due to hormone shifts as mentioned by @Jen. Note that my Dexcom was not totally lining up with the magnitude of swings I was seeing per fingerstick (and feeling).