In broodmares undergoing artificial insemination is intrauterine fluid development more likely with frozen semen or chilled semen?

PICO QUESTION: In broodmares undergoing artificial insemination, is intrauterine fluid development more likely postinsemination with frozen semen compared to insemination with chilled semen?

CATEGORY OF RESEARCH: Incidence.

NUMBER AND TYPE OF STUDY DESIGNS REVIEWED: Three retrospective cohort studies were critically appraised.

STRENGTH OF EVIDENCE: Weak.

OUTCOMES REPORTED: A lower rate of postbreeding intrauterine fluid occurred in mares inseminated with frozen semen compared to chilled semen in two studies, and a higher rate in one study.

CONCLUSION

The evidence available is weak and warrants further research into postbreeding intrauterine fluid rates in mares inseminated with frozen and chilled semen.