Preovulatory Follicular and Subsequent Luteal Size Influence Pregnancy Success in Water Buffaloes

Rahman, Saidur; Shohag, Abu Said; Kamal, Mustafa; Bari, Farida Yeasmin; Shamsuddin, M.

doi:10.1262/jrd.11-111t

Cited by 17 publications

(11 citation statements)

References 24 publications

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“…Preovulatory follicle size at the time of AI (on day 0 at estrus) are grouped as small preovulatory follicle (SPF 9 to 12 mm), medium preovulatory follicle (MPF >12 to 14 mm) and large preovulatory follicle (LPF >14 mm) (Rahman et al, 2012). Double AI was performed on the day of estrus with frozen thawed semen (French mini straws 0.25 ml, 30 million sperms per straw) after checking the semen for its post thaw motility (50-60 per cent) from a proven sire supplied by APLDA.…”

Section: Selection Of Animalsmentioning

confidence: 99%

Effect of preovulatory follicle on fertility in Graded murrah buffaloes (Bubalus bubalis)

Raj

Naidu

Marmamula

et al. 2017

IJAR

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An investigation was taken up to study the relationship of preovulatory follicle size at the time of first postpartum AI and CL biometry with conception using transrectal ultrasonography in 70 parous Graded Murrah buffaloes maintained under rural conditions. POF sizes were measured ultrasonographically and grouped in to small preovulatory follicle (SPF), medium preovulatory follicle (MPF) and large preovulatory follicle (LPF). Serum progesterone concentration at the time of AI and pregnancy status was negatively correlated indicating that when progesterone level declined to < 0.3 ng/ml (basal level) at the time of AI, the chances of the animal becoming pregnant was increased. The size of the POF was positively correlated to the size of the CL on day 10 in pregnant buffaloes. The overall POF diameter at the time of estrum was 12.31 ± 0.29 mm (Range 9 to 16 mm) in Graded Murrah buffaloes and 50 % of the buffaloes had POF size > 12 -14 mm. They conceived only if the POF diameter was more than 9 mm at the time of AI however there was no significant correlation between the POF size at the time of AI and conception. Thus, it was concluded that physiological maturity rather than the diameter of the follicle influenced the fertility in Graded Murrah buffaloes under field conditions.

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Section: Selection Of Animalsmentioning

confidence: 99%

Effect of preovulatory follicle on fertility in Graded murrah buffaloes (Bubalus bubalis)

Raj

Naidu

Marmamula

et al. 2017

IJAR

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“…Still, the general association seems to be one that binds between follicular size, follicular maturation, and pregnancy rate. In other words, the larger the follicle, the higher pregnancy rate in induced ovulation cycles [60,61]. In our study ovulation was not induced.…”

Section: Discussionmentioning

confidence: 59%

Follicular size predicts success in artificial insemination with frozen-thawed sperm in donkeys

et al. 2017

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In asses, semen collection, cryopreservation, and artificial insemination (AI) with frozen-thawed semen have been scarcely described and success rate, particularly following AI, is reportedly low. In the absence of reliable protocols, assisted reproductive technologies cannot support the conservation efforts aimed at endangered wild ass species and domestic donkey breeds. Two experiments were conducted in this study. In experiment 1 we evaluated freezing Abyssinian donkey (N = 5, 4 ejaculates each) spermatozoa using three freezing extenders (Berliner Cryomedium + glycerol, BC+G; BotuCrio, BOTU; INRAFreeze, INRA) and two cryopreservation techniques (liquid nitrogen vapour, LNV; directional freezing, DF). Post-thaw evaluation indicated that BOTU and INRA were similar and both superior to BC+G (P ≤ 0.004 for all motility tests), and that DF was superior to LNV (P < 0.002 for all evaluation parameters). In experiment 2, relying on these results, we used Abyssinian donkey sperm frozen in BOTU and INRA by DF for AI (N = 20). Prior to AI, thawed samples were diluted in corresponding centrifugation media or autologous seminal fluids at 1:1 ratio. No difference was found between BOTU and INRA or between the addition of seminal fluids or media, all resulting in ~50% pregnancy, and no differences were noted between males (N = 4). The size of pre-ovulatory follicle was a significant (P = 0.001) predictor for AI success with 9/10 pregnancies occurring when follicular size ranged between 33.1–37.4 mm, no pregnancy when it was smaller, and only one when larger. A number of ass species face the risk of extinction. Knowledge gained in this study on the Abyssinian donkey can be customised and transferred to its closely related endangered species and breeds.

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“…(), the diameter of the largest follicle between ovulating and non‐ovulating buffaloes differs significantly. However, other authors (Baruselli et al., ; Neglia et al., ; Rahman, Shoag, Kamal, Bari, & Shamsuddin, ) determined positive relationship between size of the largest follicles, consequent ovulation, corpus luteum size and pregnancy in hormonally treated buffaloes. A close relationship between follicular size and the ovulatory capacity of the first, the second and the third dominant follicle in the two groups was not observed.…”

Section: Discussionmentioning

confidence: 94%

Dominant follicles development and estradiol‐17β concentrations in non‐ovulating and ovulating post‐partum Bulgarian Murrah buffaloes

Yotov

Atanasov

2017

Reprod Domestic Animals

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This study was designed to evaluate the dominant follicles development and the estradiol-17β concentrations in non-ovulating and ovulating post-partum buffaloes. Sixteen Bulgarian Murrah buffaloes were submitted to transrectal ultrasonographic examination from the 1st post-partum day until day 50, 3 days apart. The follicular diameter of the different categories of follicles and the ovulations was recorded. The animals were allocated into two groups: I (n = 6) non-ovulating and II (n = 10) ovulating buffaloes. Serum estradiol-17β concentrations on the days for dominant follicle registration were measured by enzyme-linked immunosorbent assay. The results were statistically processed by analysis of variance, non-parametric and correlation analysis. The mean intervals between calving and first dominant follicle detection differed significantly (p < .05) among the groups (19.5 ± 6.2 vs. 13.8 ± 5.1 days), while the mean intervals between registered dominant follicles from two successive waves were comparable. The mean follicular diameters for the same category follicles in both groups were similar. Different estradiol-17β concentrations (p < .05) for the first dominant follicle between non-ovulating (23.5 ± 7.0 pg/ml) and ovulating (33.3 ± 8.4 pg/ml) buffaloes were determined. The cumulative percentages of buffaloes with firstly detected dominant follicle and ovulating animals correlated positively (r ≥ .84; p < .05) to post-partum days. In conclusion, non-ovulating and ovulating post-partum Bulgarian Murrah buffaloes showed differences in the development of the first dominant follicle and estradiol-17β concentrations during the time of dominant follicles detection.

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Preovulatory Follicular and Subsequent Luteal Size Influence Pregnancy Success in Water Buffaloes

Cited by 17 publications

References 24 publications

Effect of preovulatory follicle on fertility in Graded murrah buffaloes (Bubalus bubalis)

Effect of preovulatory follicle on fertility in Graded murrah buffaloes (Bubalus bubalis)

Follicular size predicts success in artificial insemination with frozen-thawed sperm in donkeys

Dominant follicles development and estradiol‐17β concentrations in non‐ovulating and ovulating post‐partum Bulgarian Murrah buffaloes

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