Estrus detection is an essential operation in the breeding of sows, and accurate estrus immensely important to maintain productivity reproductive performance sow. However, traditional sow relies on manually back-pressure test, which time-consuming labor-intensive. This study aimed develop automatic method detect estrus. In this study, a model based optimized yolov5s algorithm was constructed fo...

In rodents, the display of sexual behavior during proestrus-estrus transition depends on the effect of estradiol and progesterone. Progesterone exerts its effects through intracellular receptor (PR) of which two isoforms (PR-A and PR-B) are found, with different regulation and function. In this study the effects of mating on the expression pattern of PR isoforms in the hypothalamus were investi...

Thirteen-lined ground squirrels (Spermophilus tridecemlineatus) have a single annual mating season in Michigan, beginning shortly after their spring emergence from hibernation. Captive females were studied during a 3-year period to determine relations among time of removal from the coldroom, vaginal estrus, and mating behavior. Following a 7-month period females spent in a coldroom, vaginal lav...

The Nature of the Problem Heat stress has two major actions on physiology of the female that reduce the probability of a cow becoming pregnant. First, heat stress reduces ability to detect estrus. On one dairy in Florida, only about 18-24% of estruses in hot months were detected by herdsmen while 45-56% of estrus periods were detected in cool months (Thatcher and Collier, 1986). The reduction i...

In 117 weaned sows, changes in estrous behavior and vulvar reddening were related to timing of ovulation. Detection of estrus was performed every 8 h with four levels of boar stimuli to record the change in responsiveness to these stimuli. This resulted in four overlapping phases of estrus, during which a standing response could be evoked: 1) man estrus (standing response to a back pressure tes...

In a previous study (1) during the investigation of the mutually reinforced instrumental sexual rqponses in rats a positive correlation has been found between the male and female response latencies. The purpose of the present work was to investigate whether this correlation is related to the mating behavior. Mutually reinforced instrumental responses, rewarded by contact with an animal of the o...

AIM The purpose of this study was to determine the postpartum estrus cycle of guinea pigs (Cavia cobaya) using Anredera cordifolia leaf extract. MATERIALS AND METHODS Materials used were 8 males and 8 females of C. cobaya with body weight ranged 400-450 g. Mating ratio applied was 1:1. Treatments given were 0, 10, 50 and 90 mg of A. cordifolia leaf extract/head, designated as T0, T1, T2 and T...

POWERS, J. B. AND J. MOREINES. Progesterone: examination of its postulated inhibitory actions on lordosis during the rat estrous cycle. PHYSIOL. BEHAV. 17(3) 493-498, 1976. Three experiments tested whether the inhibitory effects of progesterone could be of physiological significance in regulating the duration of behavioral estrus in female rats. In animals displaying 5 day estrous cycles, a sec...