Effect of long-acting injectable progesterone supplementation, seven days after insemination, on embryo and fetal development in Nellore cows

Effect of long-acting injectable progesterone supplementation, seven days after insemination, on embryo and fetal development in Nellore cows

ABSTRACT This study evaluated the effects of long-acting injectable progesterone supplementation (P4LA) on embryonic and fetal development and birth weight in Nellore cows seven days after timed artificial insemination (TAI). One hundred and nineteen Nellore female cows became pregnant after the TAI...

Full description

Saved in:
Bibliographic Details
Published in:Arquivo brasileiro de medicina veterinária e zootecnia Vol. 76; no. 5
Main Authors: Silenciato, L.N., Ferreira, J.E., Silva, O.R., Okada, M.S.D., Paiva, M.V.R., Ribeiro, L., Dias, R., Mello, M.R.B.
Format: Journal Article
Language:English
Portuguese
Published: Universidade Federal de Minas Gerais, Escola de Veterinária 01-09-2024
Universidade Federal de Minas Gerais
Subjects:
beef cattle
embryo measurement
fetal development
progestin
ultrasound
VETERINARY SCIENCES
mensuração embrionária
desenvolvimento fetal
beef cattle
progestin
embryo measurement
gado de corte
ultrassonografia
progestágeno
fetal development
ultrasound
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT This study evaluated the effects of long-acting injectable progesterone supplementation (P4LA) on embryonic and fetal development and birth weight in Nellore cows seven days after timed artificial insemination (TAI). One hundred and nineteen Nellore female cows became pregnant after the TAI protocol and were divided into two groups: P4LA with cows that received 150mg of P4LA, seven days after insemination, in a single dose, and the control group, with cows who did not receive any hormonal supplementation after TAI. Blood samples were collected on days 17 and 30 after TAI to determine P4 concentration. Embryonic and fetal measurements were performed at 30 and 45 days of gestation, respectively, with the aid of ultrasonography, measuring craniocaudal length and thoracic diameter. No difference was observed in P4 concentration between the groups supplemented with or without injectable P4 on days 17 (P=0.73) and 30 (P=0.62) after TAI. There was no significant difference in embryonic and fetal development or birth weight between the supplemented and non-supplemented groups (P=0.59, P=0.09, and P=0.64, respectively). Supplementation with injectable progesterone seven days after TAI did not interfere with the embryonic and fetal development of Nellore cows, nor did it affect birth weight.
ISSN:1678-4162
1678-4162
DOI:10.1590/1678-4162-13204