Relationship between follicular wave dynamics and responsiveness to superovulatory treatment in Holstein heifers

To clarify the relationship between follicular wave dynamics and superovulatory response, we used ultrasonography to examine the follicles from Day 2 (Day 0=day of estrus) to the day before the superstimulatory treatment in 15 Holstein heifers. The heifers were divided into a CIDR group and Non-CIDR...

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Published inJapanese Journal of Veterinary Clinics (Japan) Vol. 31; no. 3
Main Authors Fukuda, T.(Iwate Univ., Morioka (Japan). Faculty of Agriculture), Osawa, T, Uchiza, M, Tameoka, N, Endo, T, Oi, T, Araya, K, Shimomura, N, Hirosawa, Y, Izaike, Y
Format Journal Article
LanguageJapanese
Published 31.12.2008
Subjects
ANIMAL EMBRYOS
COWS
EMBRIONES ANIMALES
EMBRYON ANIMAL
FOLICULOS OVARICOS
FOLLICULE OVARIEN
OVAIRE
OVARIAN FOLLICLES
OVARIES
OVARIOS
PROGESTERONA
PROGESTERONE
SUPEROVULACION
SUPEROVULATION
VACA
VACHE
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Summary:To clarify the relationship between follicular wave dynamics and superovulatory response, we used ultrasonography to examine the follicles from Day 2 (Day 0=day of estrus) to the day before the superstimulatory treatment in 15 Holstein heifers. The heifers were divided into a CIDR group and Non-CIDR group. The numbers of corpora lutea (CLs) and remaining large follicles were counted on the day before embryo recovery. Highest and lowest numbers of small follicles were seen on Day 4 and Day 12, respectively in the CIDR group, and on Day 6 and Day 10 in the Non-CIDR group. In both groups, the number of small follicles on the day before the superstimulatory treatment was significantly and positively correlated (CIDR group: r=0.897, P0.05; Non-CIDR group: r
Bibliography:L70
2009002780
L53
ISSN:1346-8464
DOI:10.4190/jjvc.31.137