Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Cloning of Dolly the Sheep

Cloning of Dolly the Sheep

The first successfully cloned mammal was Dolly, a sheep, born on 5th July 1996 at Roslin Institute, Scotland. The cloned sheep was named after the American singer Dolly Parton. Dolly lived for seven years and died of respiratory complications, which is speculated to be due to the actual age of her DNA. Because the DNA in cloned cells belongs to an older individual, the cloned individual’s life expectancy may be affected. Indeed, analysis of Dolly’s DNA revealed shorter telomeres than other...

Reproductive Cloning

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Biocompatibility and heat stress stabilisation of bovine sperm cryopreserved with ectoine.

Animal reproduction science·2026

Same author

Expression of interferon-stimulated genes in the endometrium, cervix and vagina on Day 15 of pregnancy in cattle.

Theriogenology·2026

Same author

Erratum to "Incidence and timing of pregnancy loss following timed artificial insemination or timed embryo transfer with a fresh or frozen in vitro-produced embryo" (J. Dairy Sci. 108:1022-1038).

Journal of dairy science·2025

Same author

Gestation length, calf birth weight, calving difficulty, perinatal mortality, and calf health following timed artificial insemination or embryo transfer with fresh or frozen in vitro-produced embryos.

Journal of dairy science·2025

Same author

Fertility in lactating dairy cows following timed embryo transfer with fresh in vitro-produced embryos derived from conventional or sex-sorted semen.

Journal of dairy science·2025

Same author

Effect of enhanced early life nutrition on the molecular regulation of anterior pituitary function in Holstein Friesian bull calves.

Scientific reports·2025

Same journal

Proceedings of the Eight International Symposium on Reproduction in Domestic Ruminants. September 3-7, 2010. Anchorage, Alaska, USA.

Society of Reproduction and Fertility supplement·2011

Same journal

Unique strategies to control reproduction in camels.

Society of Reproduction and Fertility supplement·2011

Same journal

Gestation length in farmed reindeer.

Society of Reproduction and Fertility supplement·2011

Same journal

Enhancing reproductive performance in domestic dairy water buffalo (Bubalus bubalis).

Society of Reproduction and Fertility supplement·2011

Same journal

Assisted reproduction in Mediterranean wild ruminants: lessons from the Spanish ibex (Capra pyrenaica).

Society of Reproduction and Fertility supplement·2011

Same journal

Causes and consequences of the variation in the number of ovarian follicles in cattle.

Society of Reproduction and Fertility supplement·2011

See all related articles

Search research articles

Related Experiment Video

Updated: May 31, 2026

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

Published on: July 8, 2020

Using basic approaches to address applied problems in dairy reproduction.

¹School of Agriculture, Food Science and Veterinary Medicine, College of Life Sciences, University College Dublin, Belfield, Dublin 4, Ireland. pat.lonergan@ucd.ie

Society of Reproduction and Fertility Supplement

|July 16, 2011

Summary

This summary is machine-generated.

High milk production in dairy cows is linked to lower conception rates, impacting reproductive efficiency. This study investigates whether milk yield or other lactation factors cause this fertility decline.

More Related Videos

Milk Collection Methods for Mice and Reeves' Muntjac Deer

Milk Collection Methods for Mice and Reeves' Muntjac Deer

Published on: July 19, 2014

Pregnancy and Nursing Management for Embryo-Transferred and Genetically Modified Rabbits

Pregnancy and Nursing Management for Embryo-Transferred and Genetically Modified Rabbits

Published on: December 13, 2024

Related Experiment Videos

Last Updated: May 31, 2026

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

Published on: July 8, 2020

Milk Collection Methods for Mice and Reeves' Muntjac Deer

Milk Collection Methods for Mice and Reeves' Muntjac Deer

Published on: July 19, 2014

Pregnancy and Nursing Management for Embryo-Transferred and Genetically Modified Rabbits

Pregnancy and Nursing Management for Embryo-Transferred and Genetically Modified Rabbits

Published on: December 13, 2024

Area of Science:

Reproductive biology
Dairy science
Animal reproduction

Background:

Poor reproductive efficiency is a significant global issue in the dairy industry.
High milk production in cows is associated with reduced conception rates compared to heifers.
The direct cause of this fertility decline (milk yield vs. lactation factors) remains unclear.

Purpose of the Study:

To investigate the factors contributing to reduced fertility in high-producing dairy cows.
To differentiate the impact of milk production levels versus other lactation-associated factors on conception rates.
To identify key checkpoints in the reproductive axis that may be compromised.

Main Methods:

Review of existing evidence on reproductive checkpoints.
Analysis of factors including follicle development, oestrus expression, oocyte and embryo quality.
Evaluation of sperm transport, fertilization, and the uterine environment.

Main Results:

Suboptimal follicle development and poor oestrus exhibition are potential contributors.
Compromised oocyte quality can negatively affect fertilization and early embryo development.
The reproductive tract environment's suitability for embryo development is a critical factor.

Conclusions:

Reduced fertility in high-producing dairy cows is multifactorial.
Oocyte quality, embryo development, and the uterine environment are key areas to investigate.
Targeting these specific checkpoints may improve dairy cow reproductive efficiency.