Earlier this year, our randomized controlled trial of Overcome Fertility Stress was published in the Scandinavian Journal of Psychology. Women using the program showed a significant reduction in infertility related stress, an average drop of 22.85 points on the Fertility Problem Inventory, while the waitlist control group showed no significant change. The pre to post effect size was large (Cohen's d = 1.70).
Numbers like that are easy to put in a stat card and move on from, so I want to slow down on what they actually mean. A large effect size in a controlled trial means the improvement wasn't just people getting used to their situation, or regression to the mean, it was measured against a comparable group who did not receive the program and saw no equivalent change.
This trial followed an earlier 2023 feasibility study, itself run with no control group, which is why we were careful not to claim efficacy from it alone at the time. The point of running the controlled trial afterwards was precisely to test whether the early promising signal held up under stricter conditions. It did.
Fertility related distress is still an area where psychological support is rarely offered as standard care, despite good evidence that it should be. That's the gap Overcome Fertility Stress was built to close, and it's why we keep publishing the results rather than just describing them.