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Titolo:
EFFECT OF CONSTANT LIGHT ON PARTURITION AND POSTPARTUM REPRODUCTION IN THE RAT
Autore:
ROWLAND DL; VANDERSCHOOT P;
Indirizzi:
VALPARAISO UNIV,DEPT PSYCHOL VALPARAISO IN 46383 ERASMUS UNIV ROTTERDAM,FAC MED & HLTH SCI,DEPT ENDOCRINOL & REPROD 3000 DR ROTTERDAM NETHERLANDS
Titolo Testata:
Physiology & behavior
fascicolo: 3, volume: 58, anno: 1995,
pagine: 567 - 572
SICI:
0031-9384(1995)58:3<567:EOCLOP>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
LORDOSIS BEHAVIOR; RESPONSIVENESS; OVULATION; PREGNANCY; HORMONE;
Keywords:
OVULATION; ESTRUS; PHOTOPERIODISM; BIRTH; POSTPARTUM; RECEPTIVITY; FEMALE; SEXUAL BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
D.L. Rowland e P. Vanderschoot, "EFFECT OF CONSTANT LIGHT ON PARTURITION AND POSTPARTUM REPRODUCTION IN THE RAT", Physiology & behavior, 58(3), 1995, pp. 567-572

Abstract

Light-dark (LD) cyclicity contributes to a number of reproductive events in the rat, including estrus cyclicity, and the timing of parturition and postpartum estrus. Constant light (LL) disrupts the female's cyclicity, and fertility is typically diminished To ascertain whether constant light similarly diminishes the fertility of postpartum females, LL and LD animals were compared over three successive pregnancies onseveral reproductive measures including parturition, postpartum estrus and spontaneous ovulation, the timing of estrus relative to parturition, and the number, body weights, and viability of offspring. While the 24 h pattern of parturition differed for LL and LD groups, postpartum estrus and ovulation occurred reliably in both groups. The LD groupshowed greater variation in the birth-estrus interval, the result of a delayed estrus in those females giving birth late in the light phase. The likelihood of spontaneous ovulation and overall successful reproduction was high for both groups. Thus, unlike the cycling female, thefertility of the postpartum female is relatively unaffected by constant light. As such, these findings suggest that LD cyclicity is not critical for postpartum ovulation and estrus.

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Documento generato il 09/07/20 alle ore 23:03:22