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Related Experiment Video

Updated: Apr 28, 2026

Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents

Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents

Published on: June 10, 2013

Decrease of response to social separation in preparturient ewes.

P Poindron¹, R Soto², A Romeyer³

¹CIRA, CINVESTAV-UAT, AP 62, Tlaxcala, 90 000 TLAX., Mexico; FES Cuautitlan, UNAM, Carretera México-Teoloyucan, Km. 2.5, Cuautitlan-Izcalli, CP 54 700 Edo de México, Mexico; URA CNRS 1291, INRA, 37 380 NOUZILLY, France.

Behavioural Processes

|June 5, 2014

Summary

This summary is machine-generated.

Periparturient ewes show reduced responses to social isolation, indicating physiological changes before birth decrease gregariousness. This effect is not solely due to maternal bonding with the newborn lamb.

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Published on: March 16, 2018

Area of Science:

Animal Behavior
Reproductive Physiology
Ethology

Background:

Social isolation can induce stress and behavioral changes in various species.
Previous research suggests parturient ewes exhibit altered responses to social separation.
Understanding these changes is crucial for animal welfare and management.

Purpose of the Study:

To compare the response to social isolation in non-pregnant and periparturient ewes.
To investigate the timing of changes in social behavior around parturition.
To determine if maternal bonding is the sole factor influencing reduced social responses post-birth.

Main Methods:

Rambouillet ewes (non-pregnant controls and periparturient) were subjected to three social separation tests.
Tests were conducted at different stages: prepartum and postpartum.
Behavioral responses including vocalizations, activity, and elimination were recorded.

Main Results:

Both groups exhibited increased agitation upon removal of conspecifics.
Periparturient ewes showed significantly higher agitation in response to social separation in later tests (closer to and after parturition).
Few differences were observed in the earliest prepartum test.

Conclusions:

Reduced response to social separation in periparturient ewes is not solely attributed to maternal bonding.
Internal physiological factors in the mother reduce gregariousness even before parturition.
These findings suggest a prepartum shift in social behavior independent of the neonate.