In some cases, female infertility can be associated with an overgrowth of pathogenic bacteria, candida, fungi, or parasites. Symptoms may include bloating, gas, alternating diarrhea with constipation, and bad breath. Many gynecological infections leading to infertility are caused by microbes entering the vagina or uterus from the anus. Stool cultures can help diagnose these issues, and treatment focuses on balancing the large bowel flora with supplements like Lactobacillus acidophilus.