Abstract

Female rats in the wild appear to mate and conceive during a brief period of postpartum estrus, usually within the first 24 h following parturition. This shortens the interval between successive litters and can thereby greatly increase the female's overall reproductive output. This study presents a quantitative analysis of the time of onset, duration, and quality of the receptive behavior of females during this time. Females were tested for receptivity every 3 h following the delivery of the first pup. The percentage of females displaying lordosis rose rapidly from 30% at 6 h to 100% at 9 h and at 12 h. Receptivity declined steadily after 12 h, with 20% showing lordosis at 21 h. The quality of lordosis followed a similar curve. The postpartum estrus appeared to depend more upon the onset of parturition than it did upon the ambient photoperiod.

Original languageEnglish (US)
Pages (from-to)994-999
Number of pages6
JournalBiology of reproduction
Volume23
Issue number5
DOIs
StatePublished - Jan 1 1980

Fingerprint

Estrus
Postpartum Period
Lordosis
Parturition
Photoperiod

All Science Journal Classification (ASJC) codes

  • Cell Biology

Cite this

Connor, J. R. ; Davis, H. N. / Postpartum estrus in Norway rats. I. Behaviour. In: Biology of reproduction. 1980 ; Vol. 23, No. 5. pp. 994-999.
@article{a42dc35b86f24955bf5faefc2e5f756e,
title = "Postpartum estrus in Norway rats. I. Behaviour",
abstract = "Female rats in the wild appear to mate and conceive during a brief period of postpartum estrus, usually within the first 24 h following parturition. This shortens the interval between successive litters and can thereby greatly increase the female's overall reproductive output. This study presents a quantitative analysis of the time of onset, duration, and quality of the receptive behavior of females during this time. Females were tested for receptivity every 3 h following the delivery of the first pup. The percentage of females displaying lordosis rose rapidly from 30{\%} at 6 h to 100{\%} at 9 h and at 12 h. Receptivity declined steadily after 12 h, with 20{\%} showing lordosis at 21 h. The quality of lordosis followed a similar curve. The postpartum estrus appeared to depend more upon the onset of parturition than it did upon the ambient photoperiod.",
author = "Connor, {J. R.} and Davis, {H. N.}",
year = "1980",
month = "1",
day = "1",
doi = "10.1095/biolreprod23.5.994",
language = "English (US)",
volume = "23",
pages = "994--999",
journal = "Biology of Reproduction",
issn = "0006-3363",
publisher = "Society for the Study of Reproduction",
number = "5",

}

Postpartum estrus in Norway rats. I. Behaviour. / Connor, J. R.; Davis, H. N.

In: Biology of reproduction, Vol. 23, No. 5, 01.01.1980, p. 994-999.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Postpartum estrus in Norway rats. I. Behaviour

AU - Connor, J. R.

AU - Davis, H. N.

PY - 1980/1/1

Y1 - 1980/1/1

N2 - Female rats in the wild appear to mate and conceive during a brief period of postpartum estrus, usually within the first 24 h following parturition. This shortens the interval between successive litters and can thereby greatly increase the female's overall reproductive output. This study presents a quantitative analysis of the time of onset, duration, and quality of the receptive behavior of females during this time. Females were tested for receptivity every 3 h following the delivery of the first pup. The percentage of females displaying lordosis rose rapidly from 30% at 6 h to 100% at 9 h and at 12 h. Receptivity declined steadily after 12 h, with 20% showing lordosis at 21 h. The quality of lordosis followed a similar curve. The postpartum estrus appeared to depend more upon the onset of parturition than it did upon the ambient photoperiod.

AB - Female rats in the wild appear to mate and conceive during a brief period of postpartum estrus, usually within the first 24 h following parturition. This shortens the interval between successive litters and can thereby greatly increase the female's overall reproductive output. This study presents a quantitative analysis of the time of onset, duration, and quality of the receptive behavior of females during this time. Females were tested for receptivity every 3 h following the delivery of the first pup. The percentage of females displaying lordosis rose rapidly from 30% at 6 h to 100% at 9 h and at 12 h. Receptivity declined steadily after 12 h, with 20% showing lordosis at 21 h. The quality of lordosis followed a similar curve. The postpartum estrus appeared to depend more upon the onset of parturition than it did upon the ambient photoperiod.

UR - http://www.scopus.com/inward/record.url?scp=0019122427&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0019122427&partnerID=8YFLogxK

U2 - 10.1095/biolreprod23.5.994

DO - 10.1095/biolreprod23.5.994

M3 - Article

C2 - 7470535

AN - SCOPUS:0019122427

VL - 23

SP - 994

EP - 999

JO - Biology of Reproduction

JF - Biology of Reproduction

SN - 0006-3363

IS - 5

ER -