Cystic Corpora Lutea and Normal and Cystic Graafian Follicles in the Cow

Donaldson, Lloyd E.; Hansel, William

doi:10.1111/j.1751-0813.1968.tb09104.x

Cited by 40 publications

(26 citation statements)

References 11 publications

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“…That notion is supported by the fact that cuboidal scarcely ciliated and single layered epithelium coexisted with stratified squamous keratinizing epithelium in some of these previously described lesions (Costa, 1974;Edwards, 2002). As early as in the 1960's, Donaldson and Hansel (1968) have mentioned squamous metaplasia of the rete ovarii in a study which aimed to evaluate cystic corpora lutea and follicular cysts in bovine ovaries, but in spite of mentioning it they did not describe or document the lesion (Donaldson and Hansel, 1968). Considering its clinical presentation and its tendency to generate cystic lesions in the ovary, degenerative cystic conditions of the ovary as well as ovarian cystic neoplasms should be included in the differential diagnosis.…”

Section: Discussionmentioning

confidence: 75%

Clinical and pathological presentation of squamous metaplasia of the rete ovarii in a Zebu cow

Borges

Peixoto

Santos

2016

Arq. Bras. Med. Vet. Zootec.

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Squamous metaplasia of rete ovarii is characterized by replacement of the normal cuboidal epithelium of rete ovarii by a keratinized stratified scamous epithelium, leading to accumulation of keratinized material within the tubules and cystic dilatation of rete ovarii. The present study decribes a case of scamous metaplasia of rete ovarii in a 10 year old Zebu cow, including clinical, surgical, ultrasonographic, histopathological and hormonal findings. At first ultrasound examination the cow had lightly asymmetric ovaries with follicles presenting echogenicity similar to luteinized follicular cysts. After transvaginal follicular aspiration creamy yellowish sanguineous-purulent content was recovered. After unilateral ovariectomy the ovary was sectioned and brownish viscous material drained from cystic cavity. Histopathology confirmed the diagnosid of squamous metaplasia of the rete ovarii. Progesterone concentrations assessed by chemiluminescent enzyme immunoassay within different time periods after ovariectomy showed that pathology did not compromise normal luteal ovarian activity in a contralateral reminiscent ovary.

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Section: Discussionmentioning

confidence: 75%

Clinical and pathological presentation of squamous metaplasia of the rete ovarii in a Zebu cow

Borges

Peixoto

Santos

2016

Arq. Bras. Med. Vet. Zootec.

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“…Hasler et al [13] reported that the pregnancy rate in cows with cystic CL was comparable to that in cows with favorably developing CL in surgical transfer of fresh embryos. Some reports have also shown the blood P concentration in cows with cystic CL to be lower than that in cows with normal luteinization [28,29], while others have shown the blood P concentration in cows with cystic CL to be the same as that in cows with normal luteinization [30,31]. Taking these observations into consideration, P-secreting function is considered to depend on the quantity of luteal tissue, and cystic CL does not impair pregnancy if the quantity of luteal tissue is good enough and the Psecreting function is normal, while the pregnancy rate is impaired if the quantity of luteal tissue is small and P secretion is subnormal.…”

Section: Discussionmentioning

confidence: 99%

Pregnancy Rate and Blood Progesterone Concentrations on the Previous Day and the Day of Frozen Embryo Transfer in Parous Recipient Cows of Japanese Black.

Nishigai

Kamomae

Tanaka

et al. 1998

Journal of Reproduction and Development

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Abstract. Blood progesterone (P) concentrations were determined on the previous day (6 days after onset of estrus; day 6) and the day of embryo transfer (7 days after onset of estrus; day 7) in recipients of Japanese Black beef cow to clarify the correlation between luteal function and pregnancy rate in the stepwise transfer method of frozen Japanese Black embryos. When the blood P concentrations on both day 6 and day 7 in the bovine recipients increased, the pregnancy rate also tended to increase. Pregnancy rates in the recipients with blood P concentration <2.5 ng/ml and 2.5 ng/ml on day 6 were 38.6% (17/44) and 60.7% (34/56), respectively, showing a significant (P <0.05) difference. The pregnancy rate in the recipients with blood P concentration <2.5 ng/ml on day 7 was 35.7% (10/28), while the corresponding rate was 56.9% (41/72) in the recipients with blood P concentration of 2.5 ng/ml, showing no significant difference. The pregnancy rate in the recipients in which blood P concentration was <2.5 ng/ml on day 6, and increased to 2.5 ng/ml on day 7 was low at 45.0% (9/20), while the rate in the recipients which showed blood P concentration of 2.5 ng/ml on both day 6 and day 7 was as high as 61.5% (32/52). The relationship between the blood P concentration and luteal development on day 6 corresponding to pregnancy rate was investigated by dividing corpus luteum (CL) into the following three groups by rectal palpation findings : favorably developing, poorly developing and cystic groups. The mean blood P concentration was 2.8 ng/ml in the favorably developing CL, whereas the levels were as low as 2.0 ng/ml and 2.1 ng/ml in the poorly developing CL and cystic CL, respectively. The pregnancy rate for the favorably developing CL was 55.3% (42/76) which tended to be higher than for the poorly developing CL , (44.4% (8/18)), and cystic CL, (16.7% (1/6)), respectively. These observations showed that a high pregnancy rate is achieved by selecting cows with blood P concentration of 2.5 ng/ml on day 6 and day 7 of embryo transfer.

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“…Rajakoski (1960) described a model of "follicular waves" during the bovine oestrus cycle, reporting differences in the development of a follicular population between one phase of growth, followed by a static phase, and subsequent follicular atresia. Other authors have argued that follicular growth is constant and independent of the cycle (Donaldson and Hansel, 1968;Dufour et al, 1972;Spicer and Echternkamp, 1986).It is now well known that the most frequent patterns of follicular development in cows are the 2 follicular wave pa�ern (Rajakoski, 1960;Mariana and Nguyen, 1973;Pierson and Ginther, 1988;Ginther et al, 1989b;Knopf et al, 1989;Stock and Fortune, 1993; Carriere et al, 1995) and the 3 follicular wave pa�ern (Ireland and Roche, 1983;Stock and Fortune, 1993; Carriere et al, 1995;Taya et al, 1996). Cycles with one or four follicular waves have been reported less frequently Savio et al,1988; Carriere et al, 1994).…”

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confidence: 99%

mentioning

confidence: 99%

Follicular growth patterns in repeat breeder cows

Pérez¹,

Rodríguez²,

Dorado³

et al. 2003

Vet. Med. - Czech

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Folliculogenesis includes recurrent processes of follicular recruitment, selection, growth and maturation during the female's cycle, ending with ovulation. These process are regulated by interactions between hormones, growth factors, cellular communication systems and genes (Roche and Boland, 1991).Before real-time ultrasonography, knowledge of follicular development was based on the study of the cyclical pa�erns of gonadotropins and steroid hormones, and/or using laparoscopy for counting and measuring follicles a�er marking (Rajakoski, 1960;Dufour et al., 1972;Ma�on et al., 1981;Ireland and Roche, 1983;Fortune, 1993).The ultrasound-scan has made it possible to establish follicular growth pa�erns in two-weekold pre-puberal cows (Evans et al., 1994), in heifers (Savio et al., 1988;Ginther et al., 1989b;Sunderland et al., 1994); in postpartum cows (Savio et al., 1990); in pregnant cows (Pierson and Ginther, 1986;Ginther et al., 1989c;Savio et al., 1990;Thatcher et al., 1991;Ginther et al., 1996), in anovulatory cows (McDougall et al., 1995); and a�er oestrus synchronisation treatments (Sirois and Fortune, 1990;Stock and Fortune, 1993). Rajakoski (1960) described a model of "follicular waves" during the bovine oestrus cycle, reporting differences in the development of a follicular population between one phase of growth, followed by a static phase, and subsequent follicular atresia. Other authors have argued that follicular growth is constant and independent of the cycle (Donaldson and Hansel, 1968;Dufour et al., 1972;Spicer and Echternkamp, 1986).It is now well known that the most frequent patterns of follicular development in cows are the 2 follicular wave pa�ern (Rajakoski, 1960;Mariana and Nguyen, 1973;Pierson and Ginther, 1988;Ginther et al., 1989b;Knopf et al., 1989;Stock and Fortune, 1993; Carriere et al., 1995) and the 3 follicular wave pa�ern (Ireland and Roche, 1983;Stock and Fortune, 1993; Carriere et al., 1995;Taya et al., 1996). Cycles with one or four follicular waves have been reported less frequently Savio et al.,1988; Carriere et al., 1994).Until now, no studies have focused on describing follicular dynamics in repeat breeding cows throughout their natural cycle (without hormonal treatment). Repeat breeder cows (RBC) show a repetition of cycles of normal length and gestation in them that has failed at least 3 times consecutively. The aetiology of this pathology is broad and is o�en described as multi-factor (Lafi and Kaneene, 1988;Bruyas et al., 1993;Almeida, 1995;Pedroso and Roller, 1996). One possible reason for the lack of research in this field may be the difficulty in obtaining a group ABSTRACT: The aim of this study was to examine follicular development pa�erns in eighteen repeat breeder cows through natural oestrus cycles. Ovarian ultrasonographic examinations over 32 days a�er artificial insemination revealed that two follicular waves were the predominant pa�erns in animals with this syndrome (72.2%). Cycles with one or four waves rarely appeared. The ovulatory follicular diameter (day 0) w...

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Cystic Corpora Lutea and Normal and Cystic Graafian Follicles in the Cow

Cited by 40 publications

References 11 publications

Clinical and pathological presentation of squamous metaplasia of the rete ovarii in a Zebu cow

Clinical and pathological presentation of squamous metaplasia of the rete ovarii in a Zebu cow

Pregnancy Rate and Blood Progesterone Concentrations on the Previous Day and the Day of Frozen Embryo Transfer in Parous Recipient Cows of Japanese Black.

Follicular growth patterns in repeat breeder cows

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