Cetrorelix suppresses the dominant follicle and synchronizes follicular waves and ovulation in cattle
Bibliographic record
Abstract
To determine the effects of a GnRH antagonist on ovarian function in cattle, we tested the hypotheses that cetrorelix will (1) cause regression of the extant dominant follicle by altering gonadotrophin secretion and (2) induce a new follicular wave emergence at a consistent time after treatment. In Experiment 1, heifers were given 1.5 mg cetrorelix im on Days 1-2 (Day 0 = wave emergence), Days 3-4, and Days 6-7, or normal saline (Control, n = 8 per group). The dominant follicle was smaller and regressed earlier in groups treated with cetrorelix on Days 1-2 or Days 3-4 than in Controls (P = 0.01). Plasma LH concentrations were lower (P = 0.04) for 3 days after treatment, and the pre-wave surge in FSH occurred earlier in groups treated with cetrorelix on Days 1-2 or Days 3-4 than Controls (P = 0.01). Corpus luteum diameter was smaller (P = 0.01) in the cetrorelix groups, but luteal vascularity, life-span, or progesterone production was not affected. In Experiment 2, heifers were treated with a single 3 mg dose of cetrorelix on Day 1, 3, or 6, or normal saline (Control, n = 8 per group), given prostaglandin F2a and inseminated. Wave emergence occurred synchronously 3.6 ± 0.3 days after cetrorelix treatment, ovulations occurred 12.4 ± 0.3 days later, and 13/23 heifers became pregnant. In Experiment 3, cetrorelix given at random days of the cycle induced a new wave 3.4 ± 0.3 days later and wave emergence was more synchronous than in saline-treated cows (Barlett test P = 0.04). Results supported hypotheses and provide rationale for the development of new cetrorelix-based protocols for breeding management in cattle.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".