Inclusion Criteria:  Female aged 18-40 at the time of egg retrieval Generally in good health (at physician's discretion) Diagnosed with Unexplained Infertility Diagnosed with or suspected of having endometriosis (at ONE Fertility physician's discretion) Normal uterine cavity as assessed by prior sonohysterogram Planning to undergo Frozen Embryo Transfer with ≥1 frozen blastocyst ≥3BB (grade Gardner) to transfer Able to understand, comply and consent to protocol requirements and instructions Able to attend scheduled study visits and complete required investigations  Exclusion Criteria:  Any known endometrial pathologies other than endometriosis Polycystic ovary syndrome Ovulatory dysfunction Male factor infertility (Total Motile Sperm Count <5M/mL) Poorly controlled auto-immune disease and/or diabetes (at physician's discretion) Is immune-compromised Cockayne syndrome Allergy to Metronidazole Allergy to rice (bran and hull), pomegranate, Acacia gum, hypromellose, fermented gellan gum, chlorophyllin, or sunflower oil Known intolerance of Lactobacillus and/or Bifidobacterium-containing probiotics Antibiotic use in the past month  Use of any of the following:  Oral probiotics Alcohol Anticoagulant therapies (Warfarin type) Drugs containing alcohol Busulfan Cyclosporin Disulfiram 5-Fluoruracil Lithium Phenytoin or Phenobarbital Vecuronium Proton pump inhibitors Histamine H2-receptor antagonists Currently experiencing nausea, fever, vomiting, bloody diarrhea or severe abdominal pain