How does ayurvedic medicine phalasarpis work to open blocked fallopian tubes?

Unknown mechanism: Ayervedic medicine is a system of treating disease based on folk experience and trust in the practitioner rather than the more modern approaches. I respect it but i doubt you'll find a mechanism for this butter-based herbal mix. You'll need to decide whether it's worked, or is a placebo. But in any case, i hope you get what you want -- good luck.