A. Menchaca

Publications56
h-index17
Citations1,275
Highly Influential Citations82
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Ovarian dynamics, serum estradiol and progesterone concentrations during the interovulatory interval in goats.
Ovarian changes determined by daily transrectal ultrasonic scanning, and its correlation with serum progesterone (P4) and estradiol (E2) concentrations were studied in seven cyclic Saanen goats.… Expand
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New treatments associated with timed artificial insemination in small ruminants.
Timed artificial insemination (TAI) is a very important tool in production systems, as it has a direct impact on cost-efficiency by reducing labour resulting from oestrus detection. However, to make… Expand
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Relation between progesterone concentrations during the early luteal phase and follicular dynamics in goats.
We studied the relationship between progesterone (P4) concentrations early in the estrus cycle and follicular dynamics in dairy goats. We used seven untreated goats (control group) and six… Expand
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Endocrine, luteal and follicular responses after the use of the short-term protocol to synchronize ovulation in goats.
The effect of the so-called Short-Term Protocol (5-day progesterone treatment+PGF(2)alpha) on ovarian activity and LH surge was studied in goats. The goats received 250IU eCG at the time of device… Expand
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Follicular recruitment and ovulatory response to FSH treatment initiated on day 0 or day 3 postovulation in goats.
The present study evaluates the effect of the presence of a large growing follicle at the onset of superovulatory treatment on follicular recruitment and ovulatory response in dairy goats. The… Expand
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Day 0 protocol: superstimulatory treatment initiated in the absence of a large follicle improves ovarian response and embryo yield in goats.
A new superstimulatory protocol (Day 0 Protocol) to initiate FSH treatment in the absence of a large follicle was compared to a traditional protocol in goats. The Day 0 Protocol (n=44) consisted of… Expand
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Storage of ram semen at 5 °C: effects of preservation period and timed artificial insemination on pregnancy rate in ewes
Artificial insemination (AI) using chilled ram semen has not been adopted in Uruguay yet, probably due to a lack of information about the use of this technology in the country. This study evaluated… Expand
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Response of the 1-5 day-aged ovine corpus luteum to prostaglandin F2alpha.
The hypothesis that, in the ewe, prostaglandin (PG) F2alpha administration on day 3 after ovulation is followed by luteolysis and ovulation was tested using 24 animals. The ewes were treated with a… Expand
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Ovarian responses and pregnancy rate with previously used intravaginal progesterone releasing devices for fixed-time artificial insemination in sheep.
The objective was to determine serum progesterone concentrations, ovarian responses, and pregnancy rate in sheep inseminated following a short-term protocol (6 days of treatment) with a previously… Expand
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Efficient Generation of Myostatin Knock-Out Sheep Using CRISPR/Cas9 Technology and Microinjection into Zygotes
While CRISPR/Cas9 technology has proven to be a valuable system to generate gene-targeted modified animals in several species, this tool has been scarcely reported in farm animals. Myostatin is… Expand
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