Imperforate Hymen and Mucometra.
Congenital imperforate hymen is rare in cattle. The complete blockage results in accumulation of uterine and cervical secretions and formation of mucometra, mucocervix, and mucovagina. Note the corpus luteum. Cows and heifers with mucometra or hydrometra generally cycle normally in contrast to cows with pyometra that are anestrous for long periods of time. [size of the square tile is 15 cm]
Roberts SJ (1986)