Effect of estrus resynchronization on the reproductive efficiency of zebu cows.

08:00 EDT 16th May 2019 | BioPortfolio

Summary of "Effect of estrus resynchronization on the reproductive efficiency of zebu cows."

The aim of this study was to develop a resynchronization strategy before the return of estrus in cows diagnosed as not pregnant after fixed-time artificial insemination (TAI). A total of 839 cows, approximately 45 days postpartum, were synchronized using TAI. On day 0, intravaginal progesterone-releasing devices were inserted and 2 mg of estradiol benzoate was administered. Eight days later (D8), the progesterone-releasing devices were removed and estradiol cypionate (0.5 mg, eCG (300 IU)) and prostaglandin (7.5 mg) were administered. All cows were inseminated between 48 and 56 hours after device removal (D10). Thirty days after TAI, cows that were not diagnosed as pregnant by ultrasound were immediately resynchronized and again inseminated at a fixed time. The hormonal protocol used in the first and second rounds of TAI was the same. The pregnancy rate after the first TAI was 52% and after the second TAI it was 49%. The increase in the total pregnancy rate (synchronization + second estrus synchronization) compared to a single synchronization was 23.5%.". In conclusion, resynchronization of estrus and ovulation in zebu cows that had previously undergone TAI protocols is effective in increasing the reproductive efficiency. This article is protected by copyright. All rights reserved.


Journal Details

This article was published in the following journal.

Name: Reproduction in domestic animals = Zuchthygiene
ISSN: 1439-0531


DeepDyve research library

PubMed Articles [16502 Associated PubMed Articles listed on BioPortfolio]

Evaluation of an ear-attached accelerometer for detecting estrus events in indoor housed dairy cows.

Precision dairy farming technologies have tremendous potential to improve and support farmers in herd management decisions, particularly in reproductive management. Nowadays, estrus detection in cows ...

Presynchronization strategy using prostaglandin F, gonadotropin-releasing hormone, and detection of estrus to improve fertility in a resynchronization program for dairy cows.

Objectives of experiment 1 were to evaluate pregnancy outcomes and reinsemination patterns of cows whose estrous cycles or ovulation were presynchronized with prostaglandin (PGF) or PGF and gonadotrop...

Effect of biotin supplementation on milk yield of Girolando cows reared in a tropical climate.

The objective of this study was to evaluate the effect of biotin supplementation on milk yield and the reproductive efficiency in Girolando cows. The study was conducted on a dairy farm located in cen...

Randomized clinical trial to evaluate the efficacy of prostaglandin F to treat purulent vaginal discharge in lactating dairy cows.

The objectives of this study were (1) to assess the effect of purulent vaginal discharge (PVD) on reproductive performance using a 4-point vaginal discharge score (VDS) and (2) to evaluate the effect ...

Resynchronization of ovulation with new and reused intravaginal progesterone-releasing devices without previous pregnancy diagnosis in Bos taurus indicus cows subjected to timed-artificial insemination.

The study aimed to evaluate pregnancy per artificial insemination (P/AI) of cows subjected to synchronization and resynchronization in ovulation protocols using intravaginal progesterone-releasing ins...

Clinical Trials [3264 Associated Clinical Trials listed on BioPortfolio]

Efficiency Study of Triple-Site Cardiac Resynchronization in Patients With Heart Failure

The purpose of this study is to assess the efficiency of permanent biventricular pacing using three ventricular leads in terms of reduction in adverse cardiac events rates, improvement in ...

Pilot Study to Investigate the Creation of Physiological Rhythm by Closed Loop Stimulation in hEart Failure pAtients With chronoTropic incompEtence

The study assesses the effect of Closed Loop Stimulation (CLS) on the ventilatory efficiency slope and estimates the patient responder rate to CLS in patients with severe chronotropic inco...

Ensure Cardiac Resynchronization Therapy Study

The purpose of this study is to gather information on how doctors program particular settings on cardiac resynchronization therapy implantable cardiac defibrillators (CRT-Ds), to analyze h...

Metabolic Mapping and Cardiac Resynchronization

The purpose of this study is to gather information on the safety and effectiveness of cardiac resynchronization therapy (CRT) in patients who have mild heart failure (HF) and left bundle b...

Sensor Optimization of Cardiac Resynchronization Therapy Response

The Sensor Optimization of Cardiac Resynchronization Therapy (CRT) Response (SOCR) Study is a multicenter, prospective, non-randomized acute feasibility study that is being conducted to de...

Medical and Biotech [MESH] Definitions

Methods for recognizing the state of ESTRUS.

The period following ESTRUS during which the phenomena of estrus subside in those animals in which pregnancy or pseudopregnancy does not occur.

Occurrence or induction of ESTRUS in all of the females in a group at the same time, applies only to non-primate mammals with ESTROUS CYCLE.

A 6-methyl PROGESTERONE acetate with reported glucocorticoid activity and effect on ESTRUS.

The period of cyclic physiological and behavior changes in non-primate female mammals that exhibit ESTRUS. The estrous cycle generally consists of 4 or 5 distinct periods corresponding to the endocrine status (PROESTRUS; ESTRUS; METESTRUS; DIESTRUS; and ANESTRUS).

Quick Search


DeepDyve research library

Relevant Topics

Obstetrics and gynaecology
Fertility Menopause Obstetrics & Gynaecology Osteoporosis Women's Health Obstetrics and gynaecology comprises the care of the pregnant woman, her unborn child and the management of diseases specific to women. Most consultant...

Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...

Women's Health
Women's Health - key topics include breast cancer, pregnancy, menopause, stroke Follow and track Women's Health News on BioPortfolio: Women's Health News RSS Women'...

Searches Linking to this Article