This study examined how fungi from mother pigs are passed to their newborn piglets. Researchers collected samples from sow feces, sow vaginas, and piglet feces and analyzed the fungal communities using genetic sequencing. They found that about 47% of the fungi in piglet feces came from the mother’s intestines, while a small amount came from the vagina, with the remainder from unknown environmental sources. The findings help us understand how maternal fungi help establish a healthy gut in newborns.