A method for regulating the duration of pregnancy and the time of parturition in Sprague-Dawley rats (Charles River CD strain)
A method of shifting the dark phase of the 12/12 hr photoperiod cycle on Day 7 of pregnancy is described for regulating the duration of pregnancy to 22 days and assuring that most parturitions take place between 1100 and 1500 hr. This method, in addition, has the added convenience that matings can o...
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| Veröffentlicht in: | Developmental psychobiology 1998-03, Vol.32 (2), p.131-136 |
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| container_title | Developmental psychobiology |
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| creator | Mayer, Anne D. Rosenblatt, Jay S. |
| description | A method of shifting the dark phase of the 12/12 hr photoperiod cycle on Day 7 of pregnancy is described for regulating the duration of pregnancy to 22 days and assuring that most parturitions take place between 1100 and 1500 hr. This method, in addition, has the added convenience that matings can occur during normal laboratory hours between 0700 and 1900 hr during the dark phase of the photoperiodic cycle. Litter sizes are normal (mostly 14–16 pups) and postpartum estrus behavior occurs at the normal interval of 4 to 11½ hr after parturition. © 1998 John Wiley & Sons, Inc. Dev Psychobiol 32: 131–136, 1998 |
| doi_str_mv | 10.1002/(SICI)1098-2302(199803)32:2<131::AID-DEV6>3.0.CO;2-Q |
| format | Article |
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Dev Psychobiol 32: 131–136, 1998</abstract><cop>New York</cop><pub>John Wiley & Sons, Inc</pub><pmid>9526688</pmid><doi>10.1002/(SICI)1098-2302(199803)32:2<131::AID-DEV6>3.0.CO;2-Q</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0012-1630 |
| ispartof | Developmental psychobiology, 1998-03, Vol.32 (2), p.131-136 |
| issn | 0012-1630 1098-2302 |
| language | eng |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete |
| subjects | Animals Circadian Rhythm - physiology Estrus - physiology Female Labor, Obstetric - physiology laboratory rat litter size Male Maternal Behavior - physiology parturition Photoperiod photoperiod shift postpartum estrus Pregnancy Pregnancy, Animal - physiology Psychophysiology Rats Rats, Sprague-Dawley Time Factors |
| title | A method for regulating the duration of pregnancy and the time of parturition in Sprague-Dawley rats (Charles River CD strain) |
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