In the cycle in which I took Fertisti, the fertile mucus was negligible and I struggled with spotting during ovulation - could the supplement have an effect on this?

Analyzing the composition of Fertistim, I do not think that it has an impact on changes in the picture of the menstrual cycle (rather the opposite - I would expect to regulate any problems). Unfortunately, many external and environmental factors (e.g. stress, diet) can affect the hormonal balance - it is difficult to assess what could have influenced the changes you observed. On our website you can check the availability and prices of the preparation and order Fertistim with home delivery or collection at the pharmacy: https://www.gdziepolek.pl/produkty/104465/fertistim-dla-kobiet-proszek-do-wytworzenia-plynu/apteki I encourage you to read: https://www.gdziepolek.pl/artykuly/wspomaganie-plodnosci