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  • Title: Endometrial cytology of the normal bitch throughout the reproductive cycle.
    Author: Watts JR, Wright PJ, Lee CS.
    Journal: J Small Anim Pract; 1998 Jan; 39(1):2-9. PubMed ID: 9494927.
    Abstract:
    Samples for endometrial cytology were collected both from live bitches using transcervical uterine cannulation (n = 48) and postmortem (n = 10). The cells identified were endometrial epithelial cells, leucocytes, erythrocytes, spermatozoa, bacteria and cervical or vaginal cells. The endometrial epithelial cells varied morphologically throughout the reproductive cycle and had signs of degeneration during late dioestrus and during early and mid-anoestrus following dioestrus and postpartum. Neutrophils were the most common leucocytes observed during pro-oestrus, oestrus, dioestrus and early pregnancy, and lymphocytes during anoestrus. Macrophages were frequently seen during anoestrus. Erythrocytes were found in variable numbers at all stages of the reproductive cycle. Spermatozoa were detected in samples collected during oestrus and early pregnancy in bitches which had their last mating one to three days previously. Bacteria were commonly observed during pro-oestrus and oestrus. Cornified cervical or vaginal cells were present during pro-oestrus and oestrus. This study demonstrated that the numbers, types, proportions and morphology of cells in endometrial cytological samples from normal bitches varied throughout the reproductive cycle.
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