Abstract
Repeated exposure to estrus synchronization (ES) protocol might have detrimental effects on reproductive function. Therefore, we examined the effects of repeated exposure to a gonadotropin-based ES protocol on hormonal profiles in 47 female Xinong Saanen dairy goats. Goats were randomly assigned to receive an ES protocol either three consecutive times with 14 d interval between each protocol (3 × ES group), or once (1 × ES group) starting concurrently with the third protocol of the 3 × ES group. The estradiol concentrations in 1 × ES group were significantly lesser than those of 3 × ES group at 0, 24, 36, 60 h after controlled internal drug release withdrawal. The progesterone, luteinizing hormone, and follicle-stimulating hormone concentrations did not differ between 1 × ES and 3 × ES groups. No differences (P > 0.05) were observed in the estrus interval, estrus duration, gestation length, birth weight of kids, and the incidences of estrus, pregnancy, single birth, twinning birth, triplet birth between 1 × ES and 3 × ES groups. Litter size was smaller in goats of the 3 × ES group than in 1 × ES goats, and there were more female offspring in 3 × ES group than 1 × ES group (P < 0.05). The differences in reproductive parameters warrant further investigation in a larger population of goats subjected repeated ES.
| Original language | English |
|---|---|
| Pages (from-to) | 489-496 |
| Number of pages | 8 |
| Journal | Canadian Journal of Animal Science |
| Volume | 99 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jan 2019 |
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Effects of repeated exposure to an estrus synchronization protocol on reproductive parameters in dairy goats. / Sun, Shuang; Liu, Shimin; Luo, Jun; Chen, Zhi; Yang, Yang; Shi, Huaiping; Li, Cong; Luo, Jianing.
In: Canadian Journal of Animal Science, Vol. 99, No. 3, 01.01.2019, p. 489-496.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effects of repeated exposure to an estrus synchronization protocol on reproductive parameters in dairy goats
AU - Sun, Shuang
AU - Liu, Shimin
AU - Luo, Jun
AU - Chen, Zhi
AU - Yang, Yang
AU - Shi, Huaiping
AU - Li, Cong
AU - Luo, Jianing
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Repeated exposure to estrus synchronization (ES) protocol might have detrimental effects on reproductive function. Therefore, we examined the effects of repeated exposure to a gonadotropin-based ES protocol on hormonal profiles in 47 female Xinong Saanen dairy goats. Goats were randomly assigned to receive an ES protocol either three consecutive times with 14 d interval between each protocol (3 × ES group), or once (1 × ES group) starting concurrently with the third protocol of the 3 × ES group. The estradiol concentrations in 1 × ES group were significantly lesser than those of 3 × ES group at 0, 24, 36, 60 h after controlled internal drug release withdrawal. The progesterone, luteinizing hormone, and follicle-stimulating hormone concentrations did not differ between 1 × ES and 3 × ES groups. No differences (P > 0.05) were observed in the estrus interval, estrus duration, gestation length, birth weight of kids, and the incidences of estrus, pregnancy, single birth, twinning birth, triplet birth between 1 × ES and 3 × ES groups. Litter size was smaller in goats of the 3 × ES group than in 1 × ES goats, and there were more female offspring in 3 × ES group than 1 × ES group (P < 0.05). The differences in reproductive parameters warrant further investigation in a larger population of goats subjected repeated ES.
AB - Repeated exposure to estrus synchronization (ES) protocol might have detrimental effects on reproductive function. Therefore, we examined the effects of repeated exposure to a gonadotropin-based ES protocol on hormonal profiles in 47 female Xinong Saanen dairy goats. Goats were randomly assigned to receive an ES protocol either three consecutive times with 14 d interval between each protocol (3 × ES group), or once (1 × ES group) starting concurrently with the third protocol of the 3 × ES group. The estradiol concentrations in 1 × ES group were significantly lesser than those of 3 × ES group at 0, 24, 36, 60 h after controlled internal drug release withdrawal. The progesterone, luteinizing hormone, and follicle-stimulating hormone concentrations did not differ between 1 × ES and 3 × ES groups. No differences (P > 0.05) were observed in the estrus interval, estrus duration, gestation length, birth weight of kids, and the incidences of estrus, pregnancy, single birth, twinning birth, triplet birth between 1 × ES and 3 × ES groups. Litter size was smaller in goats of the 3 × ES group than in 1 × ES goats, and there were more female offspring in 3 × ES group than 1 × ES group (P < 0.05). The differences in reproductive parameters warrant further investigation in a larger population of goats subjected repeated ES.
KW - Hormone profile
KW - Litter size
KW - Repeated estrus synchronization protocol
KW - Xinong Saanen dairy goat
UR - http://www.scopus.com/inward/record.url?scp=85071969703&partnerID=8YFLogxK
U2 - 10.1139/cjas-2017-0183
DO - 10.1139/cjas-2017-0183
M3 - Article
VL - 99
SP - 489
EP - 496
JO - Canadian Journal of Animal Science
JF - Canadian Journal of Animal Science
SN - 0008-3984
IS - 3
ER -