In our clinical study, the most common resting pulse rate pattern we saw was this: RPR (resting pulse rate) is lowest during or just after menstruation. Then, between two and five days before ovulation, it starts to rise. It continues to rise even more after ovulation, reaching a peak during the luteal phase. It starts to fall again just before or just after the next period.

We also saw healthy, ovulatory cycles that did not have this RPR pattern. We are doing further investigation to understand these types of cycles. The important thing to know is that from what we can tell, it's simply a less common but still normal way for RPR to behave. The most important factor for confirming that ovulation occurred is still temperature. If you have a biphasic temperature pattern in your cycle, it's a strong sign that you ovulated.

Note that consuming alcohol or recreational drugs that leads you to be under the influence can impact your RPR - for more information, take a look here.