Online citations, reference lists, and bibliographies.
← Back to Search

Effect Of Constant Light On Parturition And Postpartum Reproduction In The Rat

D. Rowland, P. Schoot
Published 1995 · Biology, Medicine

Cite This
Download PDF
Analyze on Scholarcy
Share
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 on several 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 group showed 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, the fertility 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.
This paper references
10.1016/S0166-4328(05)80167-6
Copulatory stimuli in rats induce heat abbreviation through effects on genitalia but not through effects on central nervous mechanisms supporting the steroid hormone-induced sexual responsiveness
P. V. D. Schoot (1992)
10.1210/ENDO-88-4-964
Serum FSH and LH in constant light-induced persistent estrus: short-term and long-term studies.
T. Daane (1971)
Preovulatory requirements of ovarian hormones for the production of the ovulatory luteinizing hormone surge in 4 and 5 day cycles of female rats [proceedings].
P. van der Schoot (1979)
10.1210/ENDO-92-1-108
Ovulation in postpartum rats.
S. Ying (1973)
10.1530/ACTA.0.0460483
QUANTITATIVE STUDIES ON THE EFFECT OF THE SUCKLING STIMULUS ON BLASTOCYST IMPLANTATION IN THE RAT.
G. Zeilmaker (1964)
10.1530/JRF.0.0010036
Prenatal mortality in the rabbit Oryctolagus cuniculus.
C. E. Adams (1960)
10.1095/BIOLREPROD31.4.619
Postpartum preovulatory surge of gonadotropin secretion in the rat may be initiated by the labor process.
S. R. Fox (1984)
The time factor in ovulation blockade in rats under differing lighting conditions. Endocrinology
J. W. Everett (1967)
10.1530/JRF.0.0800563
Time of parturition in rats after melatonin administration or change of photoperiod.
M. Bosc (1987)
10.1677/JOE.0.0570007
Induced ovulation in albino rats exposed to constant light.
K. Brown-Grant (1973)
Postparturitional heat and the time of ovulation in the albino rat
R. J. Blandau (1941)
10.1159/000124067
Effects of progesterone on the pituitary responsiveness to, and priming effect of luteinizing hormone releasing hormone in female rats exposed to constant light.
A. Watts (1985)
10.1210/ENDO-76-4-620
TIMING OF POST-PARTUM OVULATION IN THE RAT.
J. C. Hoffmann (1965)
Acute effects of gonadal hormones on lordosis behavior of the female rat
F. H. de Jonge (1986)
Timing of parturition in the rat: an analysis of successive births.
D. Rowland (1991)
10.1093/BIOLREPROD/5.3.297
Estrone and estradiol levels in the ovarian venous blood from rats during the estrous cycle and pregnancy.
A. Shaikh (1971)
10.1038/260780a0
Timing of the photoperiod and the hour of birth in rats
DENNIS W. Lincoln (1976)
10.1016/B978-0-12-571125-8.50004-1
A model for the regulation of ovulation in the rat.
N. Schwartz (1969)
10.3181/00379727-145-37918
Effect of Photoperiod on Time of Blastocyst Implantation in the Rat
Natha Lilit (1974)
10.1016/0378-4320(79)90040-X
Photoperiodic dissection of endocrine events at parturition
D. Lincoln (1979)
10.1016/0018-506X(77)90021-6
The induction of pseudopregnancy and pregnancy by mating in albino rats exposed to constant light
K. Brown-Grant (1977)
10.1016/0031-9384(85)90078-2
Timing of parturition and postpartum mating in norway rats: Interaction of an interval timer and a circadian gate
A. Gilbert (1985)
Influence of environmental lighting on duration of pregnancy in the rat.
J. Mitchell (1970)
10.1016/0031-9384(70)90246-5
The effect of constant light on the estrous cycle and behaviour of the female rat.
D. F. Hardy (1970)
Ovulation in the postpartum rat
S Ying (1973)
10.2307/2283756
Computational Handbook of Statistics
J. Bruning (1968)
Acute effects of gonadal hormones on lordosis behavior of the female rat
F H De Jonge (1986)
10.1016/0166-4328(86)90101-4
Acute effects of sex steroids on lordosis behaviour of the female rat
F. Jonge (1986)
10.1113/EXPPHYSIOL.1986.SP002985
The effect of day length on the duration of pregnancy and the onset of parturition in the rat.
A. Flint (1986)
10.1095/BIOLREPROD23.5.994
Postpartum estrus in Norway rats. I. Behavior.
J. Connor (1980)
10.1530/ACTA.0.0900711
Ovulation blockade and receptivity in the cyclic rat.
A. van Riemsdijk (1979)
10.1210/ENDO-85-1-103
Estrogen secretion by the rat ovary in vivo during the estrous cycle and pregnancy.
K. Yoshinaga (1969)
10.1210/ENDO-44-3-234
A neurogenic timing factor in control of the ovulatory discharge of luteinizing hormone in the cyclic rat.
J. W. Everett (1949)
10.1163/156853963X00202
QUANTITATIVE MEASUREMENT OF SEXUAL RECEPTIVITY IN FEMALE RATS 1)
R. E. Kuehn (1963)
10.1677/JOE.0.0830267
A sexually dimorphic rhythm in oestradiol-activated lordosis behaviour in the rat.
S. Hansen (1979)
10.1677/JOE.0.0770381
A daily rhythm in the behavioural sensitivity of the female rat to oestradiol.
S. Hansen (1978)
10.1210/ENDO-80-4-790
Time factor in ovulation blockade in rats under differing lighting conditions.
J. W. Everett (1967)
10.1002/AR.1090810402
Post‐parturitional heat and the time of ovulation in the albino rat. Data on parturition
R. Blandau (1941)
Preovulatory requirements of ovarian hormones for the production of the ovulatory luteinizing hormone surge in 4 and 5 day cycles of female rats [proceedings].
P. vanderSchoot (1979)
Effects of handling and the light-dark cycle on time of parturition in the rat.
S. Plaut (1970)
Timing of parturition in the rat: an analysis of successive births.
Rowland Dl (1991)
10.1051/RND:19800416
Influence of photoperiod on the time of parturition in the rat. I. --Effect of the length of daily illumination on normal or adrenalectomized animals.
M. Bosc (1980)
10.1210/ENDO-87-3-472
Influence of environmental lighting on duration of pregnancy in the rat.
Mitchell Ja (1970)



This paper is referenced by
Semantic Scholar Logo Some data provided by SemanticScholar