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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
The hematopoietic system changes during the pregnancy to carry fetal development and maternal needs. This study compared the hematological parameters between ewes with single and twin pregnancies during gestation, delivery, and postpartum. The experiment was conducted on 60 healthy pregnant Dorper ewes that were divided into two experimental groups: Group 1 (G1), with single pregnancies (n=30), and Group 2 (G2), with twin pregnancies (n=30). Blood samples were collected from all ewes at different times: immediately before fixedtime artificial insemination (AI); on day 30, 90, 120, 130, and 140 of pregnancy; immediately after delivery; and at 24h and 48h postpartum. Statistical analysis compared the two groups at different times (P<0.05). Mild, normocytic, and hypochromic anemia was detected in all ewes from AI time and throughout pregnancy from both groups, but did not prove to be of clinical relevance. In the peripartum stage (from the 140th day of pregnancy to 48h postpartum), the ewes with twin pregnancies (G2) exhibited higher erythrogram values and neutrophil:lymphocyte ratio than did ewes with single pregnancies (G1). This indicated a greater hematopoietic adaptation in the body during the development of two fetuses. Except for the eosinophil numbers, all leukogram parameters were influenced by pregnancy in a similar way in both groups, and was characterized mainly by leukocytosis with neutrophilia during peripartum due to the high presence of endogenous cortisol at delivery. Thus, these findings showed that pregnancy was a stressful physiological event that increased the leukocyte count with a slight alteration in the erythrogram of Dorper ewes.
Univ Fed Vales Jequitinhonha & Mucuri UFVJM, Inst Ciencias Agr ICA, Campus Unai, BR-38610000 Unai, MG, Brazil
Univ Estadual Paulista, UNESP, Dept Clin Vet, Fac Med Vet & Zootecnia FMVZ, Botucatu, SP, Brazil
Escriterio Def Agr Bauru, Secretaria Agr & Abasteciinento Estado SSo Paulo, Bauru, SP, Brazil
Anhanguera Educ, Leme, SP, Brazil
Univ Sorocaba UNISO, Sorocaba, SP, Brazil
Inst Fed Educ Ciencia & Tecnol Catarinense, Concordia, SC, Brazil
Univ Fed Rural Rio de Janeiro UFRRJ, Dept Med & Cirurgia Vet, Seropedica, RJ, Brazil
Univ Estadual Paulista, UNESP, Dept Clin Vet, Fac Med Vet & Zootecnia FMVZ, Botucatu, SP, Brazil
FAPESP: 2015/08714-8
