Number of Follicular Waves and Their Effect on Pregnancy Rate in the Cow

Celik, HA; Aydın, İbrahim; Şendağ, Sait; Dinç, Dursun Ali

doi:10.1111/j.1439-0531.2004.00516.x

Cited by 20 publications

(19 citation statements)

References 28 publications

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“…In 2-wave IOIs dominant follicles grew to a larger size than in 3-wave IOIs, which is similar to results published in literature Townson et al, 2002;Wolfenson et al, 2004). We can find this phenomenon described not only in heifers but even in cows (Townson et al, 2002;Celik et al, 2005). Interestingly, in this experiment the difference was significant in C heifers; in H heifers we could observe only an insignificant trend.…”

Section: Discussionsupporting

confidence: 79%

“…conception rate after first AI). This could be due to the number of follicular waves per IOI (Townson et al, 2002;Celik et al, 2005), but the results are inconsistent. In lactating dairy cattle, IOIs that consist of at least three waves of follicular growth preceding ovulation and insemination appear to be conducive to improved fertility (Townson et al, 2002;Celik et al, 2005).…”

mentioning

confidence: 70%

“…These variations were statistically significant. Identical differences between the sizes of ovulatory follicles in 2-and 3-wave IOIs were described in Holstein heifers Ginther et al, 1989;Sartori et al, 2004) and in Holstein lactating cows Townson 2002;Celik et al, 2005), but data on combined breeds of cattle are missing.…”

Section: Discussionmentioning

confidence: 99%

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A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds

Šichtař¹,

Tolman²,

Rajmon³

et al. 2010

CZECH J ANIM SCI

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Differences in follicular development and repeatability of follicular growth pattern among Czech Fleckvieh (n = 20) and Holstein (n = 23) heifers were investigated. Follicular dynamics was evaluated by daily sonographic scanning during three interovulatory intervals. The mean duration of the interovulatory interval was 20.66 ± 0.32 days, no differences between breeds were observed. The proportion of the nonalterna-ting pattern was nearly the same as that of the alternating pattern (54% and 46%, respectively). The majority of IOIs ≤ 21 days were of the 2-wave pattern (71%) whereas only 29% of them were of the 3-wave pattern. Conversely, the majority of IOIs ≥ 22 days were of the 3-wave pattern (84%), whereas only 16% were of the 2-wave pattern. Differences could be observed in the Czech Fleckvieh heifers. Comparing 2-and 3-wave interovulatory intervals, 44.2% of the heifers exhibited 3 waves and 55.8% of the heifers exhibited 2 waves of follicular growth. The ratio of 3-to 2-wave heifers was about the same in the Holstein breed; in Czech Fleckvieh 2-wave cycles slightly dominated (11/12, 8/12; respectively). In Holstein heifers, the first follicular wave occurred 0.92 ± 0.15 days after ovulation in 2-wave interovulatory intervals, and the emergence of the first wave in 2-wave Czech Fleckvieh heifers appeared later (P < 0.05), 1.83 ± 0.3 days after ovulation. The maximal size reached by the dominant follicles in all animals and in the Czech Fleckvieh differed in the first and in the second wave of 2-wave cycles (P < 0.05). In 3-wave interovulatory intervals the dominant follicles in the second wave differed (P < 0.05) from the mean diameters of the first and the third wave in the Czech Fleckvieh. The ovulatory follicles were significantly (P < 0.05) smaller in 2-wave than in 3-wave interovulatory intervals among all animals and between the Holstein and Czech Fleckvieh heifers. In conclusion, we found a similar pattern of ovarian follicular dynamics in Czech Fleckvieh and Holstein heifers kept under identical nutritional and environmental conditions. Whether the significant difference in the emergence of the 1 st follicular wave in 2-wave IOIs between C and H heifers is of real biological significance is ambiguous.

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Section: Discussionsupporting

confidence: 79%

mentioning

confidence: 70%

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A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds

Šichtař¹,

Tolman²,

Rajmon³

et al. 2010

CZECH J ANIM SCI

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show abstract

“…A new wave emergence and selection of a new DF, which is the old DF regresses (Ginther et al 1999). If luteolysis occurs during the dominance period of the second DF, then it will ovulate (Burns et al 2005;Celik et al 2005). However, if the corpus luteum is still active suppressing LH pulse frequency, then the second DF will also undergo atresia, and a third wave emergence giving rise to the third DF as seen in cows (Evans 2003;Mihm et al 2002), and some breeds of buffaloes (Warriach and Ahmad 2007).…”

Section: Discussionmentioning

confidence: 93%

A study on the ovarian follicular dynamic in Iraqi Northern Buffaloes

Azawi

Ali

Noaman

2008

Trop Anim Health Prod

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The aim of the present study was to test the hypothesis of wave pattern of follicular growth and to monitor the ovarian follicular dynamic in Iraqi buffalo cows. Reproductive tracts were collected at random intervals slaughtered at Mosul abattoir. According to morphological appearance of the corpus luteum, the estrous cycle was divided into four stages. The number of subordinate follicle (<5 mm in diameter) was higher during stage 1 (metestrous) and stage (proestrous and estrous) than during other stages of the estrous cycles, 13.5 +/- 6.08 and 4 9.41 +/- 3.94, respectively. There were fewer follicles (5-8 mm in diameter) during early diestrous and proestrous, 1.66 +/- 1.42 and estrous, 0.69 +/- 0.47 than during metestrous, 4.53 +/- 3.23 and late diestrous, 3.66 +/- 2.23. Follicles > 8-12 mm in diameter were more numerous during early diestrous, 1.62 +/- 1.29 and late diestrous, 1.03 +/- 0.72. A total 38 (64.6%; 82/127) animals examined showed follicles larger than 8 mm during early and late diestrous (stage 2 and stage 3). This indicated that these buffaloes developed two follicular waves in their cycle. Buffaloes did not show follicles larger than 8 mm during early and late diestrous were 45 animals (35.4%; 45/127), but all of these presented one large follicle during the following stage. These buffaloes develop only one follicular wave in their cycle. It could be concluded that, 64.6% of Iraqi buffalo cows develop two patterns of follicular waves, and 35.4% showed one wave of follicular dynamics.

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“…1997), while Bleach et al. (2004) and Celik et al. (2005) found no effect of the number of waves on conception rate.…”

Section: Introductionmentioning

confidence: 91%

Association of Fertility with Numbers of Antral Follicles within a Follicular Wave During the Oestrous Cycle in Beef Cattle

Starbuck-Clemmer

Hernández–Fonseca²,

Ahmad

et al. 2007

Reprod Domestic Animals

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The association between conception rate at first service and numbers of follicles developed during a follicular wave was examined in 102 suckled beef cows and 14 heifers. Follicular development was monitored using ultrasonography for either two (trial 1) or three (trial 2) consecutive oestrous cycles (pre-breeding, breeding and post-breeding equivalent). Animals were examined on alternate days from day 6 after first oestrus (day 0) until ovulation and from day 6 after insemination until next ovulation or day 24 of pregnancy and were observed for oestrus twice daily and inseminated artificially at either the second (trial 1) or third oestrus (trial 2). Cows were classified as having two or three waves of follicular development for each oestrous cycle. Numbers of follicles>or=4 mm per wave were determined, and based on the maximum diameter they attained, were classified as small (4-6 mm), medium (7-10 mm) or large (>or=11 mm) follicles. Total numbers of follicles, and primarily numbers of small and medium follicles, were affected by trial and within trial by cow, oestrous cycle and follicular wave. Heifers had more small and total numbers of follicles, but fewer large follicles than cows in trial 1 (p < 0.05). The average number of antral follicles per wave in the breeding cycle or post-breeding period did not affect conception rates, which averaged 84%. Repeatability of the total numbers of antral follicles between and among oestrous cycles and follicular waves ranged from 0.01 to 0.97. In conclusion, fertility was not affected by the numbers of antral follicles >or=4 mm in diameter in a single follicular wave.

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Number of Follicular Waves and Their Effect on Pregnancy Rate in the Cow

Cited by 20 publications

References 28 publications

A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds

A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds

A study on the ovarian follicular dynamic in Iraqi Northern Buffaloes

Association of Fertility with Numbers of Antral Follicles within a Follicular Wave During the Oestrous Cycle in Beef Cattle

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