1. FSH 2. estrogen (E3g) 3. LH 4. progesterone (PdG) At baseline, tracking these four hormones lets us identify when you're ovulating (when the egg is released) so we can pinpoint your optimal fertile window. And after ovulation, they show us the quality of your luteal phase, specifically how well and how steadily your progesterone is rising (strong progesterone allows your body to sustain pregnancy). Those are the two main checkpoints we're watching for. If either one isn't being met, that points us in the right direction for what comes next. ✨Here's how it works like a relay race. I want you to think of each hormone passing the baton to the next. 1. FSH runs first. It signals your ovaries to start developing follicles, the little sacs that hold your eggs. FSH is the starting gun. Without it, nothing else gets moving. 2. Estrogen picks up next. As the follicles grow, they produce estrogen. Estrogen builds your uterine lining and shifts your cervical mucus toward that clear, watery, sperm-friendly consistency. Rising estrogen is your body saying things are progressing. 3.LH gets the baton at the peak. When estrogen rises high enough, it triggers an LH surge. That surge signals ovulation is coming, usually within 24 to 36 hours. This is what standard ovulation predictor kits detect. 4.Progesterone closes the race. After the egg is released, the empty follicle produces progesterone, which holds and supports the uterine lining so a fertilized egg can implant. If progesterone drops too soon or doesn't rise high enough, implantation becomes harder. Mira and Inito track all four. That's what makes them different from a basic OPK, like clear blue. When we can see the full sequence, we can tell exactly where a handoff may be breaking down. For example, if your progesterone levels are not rising adequately above a 5mg/ul post-ovulation, my suggestion is to reach out to your doctor and request a day 21 serum progesterone lab draw. (Or I can order it through my partnered doctor for a small fee).