Martins, C.F.G. et al. 2013. Gynecological and cytological evaluation in Holstein cows with more than three repetitions of estrus. Semina: Ciências Agrárias. 34, 6Supl2 (Dec. 2013), 3787–3794. DOI:https://doi.org/10.5433/1679-0359.2013v34n6Supl2p3787.