In March, a female in captivity gave birth to three pups and the vaginal smear taken in the following day showed estrous features, thus representing a postpartum estrus (Fig.
Postpartum estrus was observed in a female in captivity about 12 hours after giving birth, consistent with those reported in other rodents (Dewsbury et al.
Profile of plasmatic progesterone on pregnancy, and the postpartum estrus of Dasyproctaprymnolopha (Rodentia: Dasyproctidae)
05) on hormonal levels during pregnancy; and between the number of suckled offspring and the postpartum estrus period.
In a study conducted in Japan (7) where 38 high production Holstein cows were used, results showed that, the first postpartum estrus
was at 64.
Happold and Happold (1990) identified in African bats 10 strategies, considering the presence or absence of postpartum estrus
: strictly seasonal monoestry, long-term seasonal monoestry, non-seasonal monoestry, bimodal polyestry with postpartum estrus
, bimodal seasonal polyestry, continuous and bimodal polyestry with postpartum estrus
, multimodal seasonal polyestry with postpartum estrus
, multimodal continuous polyestry with postpartum estrus
, multimodal continuous polyestry without postpartum estrus
, and non-seasonal polyestry.
The animal although exhibited postpartum estrus
, became a chronic repeat breeder and conceived after 7-8 cycles and delivered a normal male calf subsequently 20 months later.
Comparative effects of early weaning or once-daily suckling on occurrence of postpartum estrus
in primiparous beef cows.
To assess the interval from calving to first postpartum estrus
, data of mounting activity were collected by Heat-Watch[R] mount detectors (Ddx Inc Denver, CO, USA) fitted to all cows in the study at the initiation of the experiment.
Puerperal uterine soundness is essential for early establishment of postpartum estrus
cyclicity (Tiwari et al.
Fertility and Open Days and Their Relation With Associated Factors With the First Postpartum Estrus
in Crossbred Dual Purpose Cows.
Effect of biostimulation on uterine involution, early ovarian activity and first postpartum estrus
cycle in beef cows.