LTF and Infertility: 117 RIF women and 55 infertile women without RIFLDM (>90% Lactobacillus-dominant microbiota) and NLDM (≤90% Lactobacillus microbiota).Patients with NLDM EF treated with oral lactoferrin supplementation (700 mg/day for a minimum of 28 consecutive days). Improved EF microbiotas are patients who increased 10% or more the proportion of Lactobacillus species in EF samples after lactoferrin treatment.