Veterinary Vaginal Cytology / Estrus Cycle Flashcards
What stage of estrus is this?
Anestrus
What stage of estrus is this?
Diestrus
What stage of estrus is this?
Estrus
What type of cells are these?
Intermediate
What type of cells are these?
Parabasal cells
What stage of estrus is this?
Proestrus
What cells are non-cornified?
Parabasal and intermediate
What cells are cornified?
Superficial cells
How long does proestrus last?
4-13 days
What is the optimal time for breeding and the average duration of this stage?
Estrus- lasts about 9 days
Known as the last stage of heat and can last 2-3 months
Diestrus
The period between heats usually lasting 4 1/2 months
Anestrus
Estrogen rises throughout ______ and peaks just before _____
Rises throughout proestrus and peaks just before estrus
What is evaluated in semen evaluation?
Headshape
Midpiece and tail
What classifies high fertility in sperm?
80% motile sperm
Normal sperm maintain motility for several hours and are relatively resistant to cooling
What classifies low fertility in sperm?
Less than 70% motility in sperm
Rapid loss of motility indicates infertility
How is the concentration of semen observed?
Hematocytometer or dilution method
What cells are seen in early proestrus?
High numbers of erythrocytes and parabasal cells
What cells are seen in late proestrus?
Erythrocytes gradually decrease
Intermediate cells with pyknotic nuclei
What cells are seen in estrus?
Squamous epithelial cells cornified and anuclear
What cells are seen in diestrus?
Noncornified squamous epi cells
Cytological debris
Neutrophils
Erythrocytes absent
What cells are seen in anestrus?
Parabasal and intermediate cells dominate
May contain some neutrophils and erythrocytes
List what each cell seen is
A. Parabasal
B. Small intermediate
C. Large intermediate
D. Superficical cell with pyknotic nucleus
E. Cornified; Anuclear superficial cell
