;

Trichomonas (Tritri…

John Rockefeller Pr…

Fred McKenzie

Nils Lagerlof

Prof. Ivanov (Russi…

Bull testis photomi…

Fertility improveme…

Enos Perry, Rutgers…

Freezing semen by a…

Containers for froz…

Early artificial in…

First calf from US …

Bovine hydrosalpinx…

Bovine ovary with i…

Bovine cervix with …

Persistent corpus l…

Gravid uterus 60 da…

Gravid bovine uteru…

Bovine tract-fluid …

Bull sperm, abnorma…

Sperm diagram

Bull sperm enlarged

Bull testis photomi…

Dorso ventral vagin…