Format

Send to

Choose Destination
Reprod Domest Anim. 2019 Nov 18. doi: 10.1111/rda.13588. [Epub ahead of print]

Corpus luteum vascularization during the maternal recognition of pregnancy in llamas (Lama glama).

Author information

1
Consejo Nacional de Investigaciones Científicas y Técnicas.
2
Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Facultad de Ciencias Veterinarias, UBA, Buenos Aires, Argentina.
3
Laboratorio de Endocrinología, CIVETAN, Fac. de Cs. Veterinarias, UNCPBA, Tandil, Argentina.
4
Cátedra de Bioestadística, Facultad de Ciencias Veterinarias, UBA, Buenos Aires, Argentina.

Abstract

The aim of this study was to characterize corpus luteum vascularization and its association with plasma progesterone concentration in early stages of pregnancy, when maternal recognition of pregnancy is expected to occur. In all animals both plasma progesterone concentration and corpus luteum vascularization increased from day 6 to day 8 post-mating and afterwards in non-pregnant llamas they started to decrease to reach basal levels around Days 12 to 14 post-mating; while in pregnant animals both variables remained elevated until the end of the study. A lineal positive relationship between corpus luteum vascularization and plasma progesterone concentration was observed in pregnant (r2  = 0.46, p < .0001) and non-pregnant llamas (r2  = 0.66, p < .0001). Pregnant animals showed higher plasma progesterone concentration and corpus luteum vascularization than the non-pregnant ones from day 12 post-mating until the end of the study (P˂0.05 and P˂0.01, respectively). These results suggest that maternal recognition of pregnancy should occur before Day 12 post-mating in order to expand luteal lifespan; maintaining corpus luteum vascularization and progesterone production. Also, the assessment of CL vascularization area could be a useful and non-invasive method for early pregnancy diagnosis due to its association with plasma progesterone concentration.

KEYWORDS:

doppler; llama; corpus luteum vascularization; progesterone

PMID:
31737943
DOI:
10.1111/rda.13588

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center