Abstract
Beef females (547) were included in three experiments to evaluate methods of identifying and inseminating nonpregnant beef females after synchronization of second estrus with norgestomet implants. In the first experiment, heifers not pregnant to the first insemination were identified for insemination via estrus (inseminated via the a.m./p.m. role or 48 h after implant removal). In the second experiment, females not pregnant to the first insemination were identified for insemination via estrus (inseminated via the a.m./p.m. role) or progesterone concentrations < 1.5 ng/mL at implant removal (inseminated 48 h after implant removal). In the third experiment, heifers not pregnant to the first insemination were identified for insemination via progesterone concentrations (as in experiment 2) or anterior vagina electrical resistance values < 81 ohm resistance 48 h after implant removal (inseminated after resistance measured). All methods of identifying and inseminating nonpregnant females were equally effective (P > 0.10) and did not effect (P > 0.10) calving rates from the first and second AI.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1077-1086 |
| Number of pages | 10 |
| Journal | Theriogenology |
| Volume | 47 |
| Issue number | 5 |
| DOIs | |
| State | Published - Apr 1 1997 |
| Externally published | Yes |
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Keywords
- Calving rate
- Electrical resistance
- Estrus synchronization
- Norgestomet
- Progesterone
ASJC Scopus subject areas
- Animal Science and Zoology
- veterinary(all)
Cite this
Methods of identifying and inseminating nonpregnant beef females after synchronization of second estrus with norgestomet implants. / Domatob, F. N.; Favero, R. J.; Ireland, F. A.; Faulkner, Dan B; Kesler, D. J.
In: Theriogenology, Vol. 47, No. 5, 01.04.1997, p. 1077-1086.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Methods of identifying and inseminating nonpregnant beef females after synchronization of second estrus with norgestomet implants
AU - Domatob, F. N.
AU - Favero, R. J.
AU - Ireland, F. A.
AU - Faulkner, Dan B
AU - Kesler, D. J.
PY - 1997/4/1
Y1 - 1997/4/1
N2 - Beef females (547) were included in three experiments to evaluate methods of identifying and inseminating nonpregnant beef females after synchronization of second estrus with norgestomet implants. In the first experiment, heifers not pregnant to the first insemination were identified for insemination via estrus (inseminated via the a.m./p.m. role or 48 h after implant removal). In the second experiment, females not pregnant to the first insemination were identified for insemination via estrus (inseminated via the a.m./p.m. role) or progesterone concentrations < 1.5 ng/mL at implant removal (inseminated 48 h after implant removal). In the third experiment, heifers not pregnant to the first insemination were identified for insemination via progesterone concentrations (as in experiment 2) or anterior vagina electrical resistance values < 81 ohm resistance 48 h after implant removal (inseminated after resistance measured). All methods of identifying and inseminating nonpregnant females were equally effective (P > 0.10) and did not effect (P > 0.10) calving rates from the first and second AI.
AB - Beef females (547) were included in three experiments to evaluate methods of identifying and inseminating nonpregnant beef females after synchronization of second estrus with norgestomet implants. In the first experiment, heifers not pregnant to the first insemination were identified for insemination via estrus (inseminated via the a.m./p.m. role or 48 h after implant removal). In the second experiment, females not pregnant to the first insemination were identified for insemination via estrus (inseminated via the a.m./p.m. role) or progesterone concentrations < 1.5 ng/mL at implant removal (inseminated 48 h after implant removal). In the third experiment, heifers not pregnant to the first insemination were identified for insemination via progesterone concentrations (as in experiment 2) or anterior vagina electrical resistance values < 81 ohm resistance 48 h after implant removal (inseminated after resistance measured). All methods of identifying and inseminating nonpregnant females were equally effective (P > 0.10) and did not effect (P > 0.10) calving rates from the first and second AI.
KW - Calving rate
KW - Electrical resistance
KW - Estrus synchronization
KW - Norgestomet
KW - Progesterone
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UR - http://www.scopus.com/inward/citedby.url?scp=0031109748&partnerID=8YFLogxK
U2 - 10.1016/S0093-691X(97)00064-2
DO - 10.1016/S0093-691X(97)00064-2
M3 - Article
C2 - 16728057
AN - SCOPUS:0031109748
VL - 47
SP - 1077
EP - 1086
JO - Theriogenology
JF - Theriogenology
SN - 0093-691X
IS - 5
ER -