Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal Université Paris-Saclay AgroParisTech ANSES ENVA CNRS INSERM UPEC FNCH

Home page

Estimation of milk production in lactating mares and factors influencing milk yield

@INRAE Emilie Derisoud
Research on mare milk is mainly concentrated on quality and information on quantity is incomplete, mainly since there has been no consensus on a method for milk yield measurement. Live weight, body condition during foaling and the age of mares are factors that influence mare milk production. The influence of the parity of the mare, however, remains unclear.

This study is the result of a partnership between IFCE (The horse and horse-riding institute), BREED and GABI. Over a period of 2 years, milk yield was evaluated on 65 mares by manual milking and/or evaluation of weight-suckle-weight (WSW), at 3-30-60-90 and 180 days after foaling. The pertinence of WSW was evaluated by studying the correlation between two methods on 23 individuals. The factors influencing milk yield, through milking data, were studied on 57 individuals. The data were divided into two subsets: an explanatory matrix containing the live weight of the mares 24 hours after parturition, parity, age, lactation year and foal sex and a response matrix  containing data from milking at the five timepoints of lactation. A correlation was found between milking and WSW on day 3, but no correlation was found for the other time points (RV 0.15).The live weight of the mare 24 hours after foaling, age and parity had a significant impact  on milk production (P < 0.05).The older or multiparous mares had a higher milk yield that the younger or primiparous mares. In addition, mares with a higher live weight after foaling produced more milk than those with a lower live weight. The results also indicate that the WSW method performed at five different time points of lactation, but without repeated measurements, is not an efficient way to estimate the milk yield of mares. Since the age and parity of the mares were closely related in the population studied, it was not possible to differentially assess their effects.

Contact :

See also

Auclair-Ronzaud, J, F Jaffrézic, L Wimel, C Dubois, D Laloë, et P Chavatte-Palmer. « Estimation of Milk Production in Suckling Mares and Factors Influencing Their Milk Yield », 2022, 9.

For more information:  Emilie Derisoud's PhD dissertation, Université Paris Saclay, 2022