The combination of hCG and GnRH analog to hasten ovulation in mares does not change luteal function and pregnancy outcome in embryo recipient mares

Author(s):  
Lorenzo G.T.M. Segabinazzi ◽  
Eunice Oba ◽  
Marco A. Alvarenga
2006 ◽  
Vol 18 (8) ◽  
pp. 857 ◽  
Author(s):  
F. Schneider ◽  
K.-P. Brüssow

The present study aimed to explore the influence of a preovulatory administered depot gonadotrophin-releasing hormone (GnRH) agonist (GnRHa; Decapeptyl®Depot) on the endocrine parameters and pregnancy outcome of gilts (n = 6). A GnRHa-supported preovulatory luteinising hormone (LH) surge was detected in all treated gilts. LH pulses were abolished completely by depot GnRHa on Day 7 and partly on Day 21 of pregnancy. In this treatment group (n = 6) four gilts were pregnant at slaughter on Day 28. In the control group receiving Gonavet®, a non-formulated GnRHa (n = 6), all pigs showed LH pulses and were pregnant at slaughter on Day 28 of gestation. Mean progesterone concentrations were elevated in controls during the early luteal phase and were similar for both groups during the implantation period. Mean concentration of unoccupied progesterone receptor was significantly higher in uterine myometrium than in endometrium, but without treatment effects. Peripheral estrone sulfate concentrations showed a similar increase in all pregnant gilts on Days 17 and 18, and remained elevated. In summary, treatment with a depot GnRHa for synchronisation of ovulation alters pulsatile LH secretion during early pregnancy in pigs. In general, this alteration seems not to exert an injurious influence on luteal function and, therefore, on embryo and early fetal development.


1994 ◽  
Vol 62 (1) ◽  
pp. 126-132 ◽  
Author(s):  
Eleonora Porcu ◽  
Luca Dal Prato ◽  
Renato Seracchioli ◽  
Raffaella Fabbri ◽  
Maria Longhi ◽  
...  

2003 ◽  
Vol 60 (6) ◽  
pp. 1111-1118 ◽  
Author(s):  
Gary J. Nie ◽  
Kristina E. Johnson ◽  
James G.W. Wenzel ◽  
Timothy D. Braden

1979 ◽  
Vol 135 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Kay Standley ◽  
Bradley Soule ◽  
Stuart A. Copans

2005 ◽  
Vol 35 (9) ◽  
pp. 48
Author(s):  
MICHELE G. SULLIVAN

Author(s):  
Monika Kushwaha ◽  
Sanjeev Narang

Background: This study is cross-sectional, observational and comparative study, at Index Medical College, Hospital & Research Centre, Indore, Madhya Pradesh from July 2017 to July 2019 with sample size 100 placentae. Method: The placenta received was evaluated blinded of maternal pregnancy outcome. The pattern of morphology was evaluated both qualitatively (type of lesion) and quantitatively (number of lesions). Result: In Present study 79% of the deliveries were term deliveries and 21% were preterm deliveries. On placental macroscopy, placenta weight was significantly low among the neonates of preterm deliveries (370.00±60.49) as compared to term deliveries (440.89±55.22). Preterm placenta had higher number of abnormal placental lesion compared to term pregnancies. Conclusion: The uteroplacental insufficiency defined as placental infarct, fibrosis of chorionic villi, thickening of blood vessels, and poor vascularity of chorionic villi. Placental histopathological lesions are strongly associated with maternal under perfusion and uteroplacental insufficiency. These are the reasons for preterm birth. Thus, knowledge of the etiological factor can be use to reduce maternal and neonatal morbidity and mortility. Keywords: Placenta, Term & Preterm.


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