The effect of multiple ampules of frozen semen on conception rate in superovulated Holstein
heifers was studied using 3 breeding regimens (n= 25): 1 ampule at 12 hr (0 hr= beginning …

Abstract Superovulated Jersey and Holstein heifers and cows were bred 9.7±2.7 h after the
first observation of estrus with a single dose of frozen semen. Animals were grouped by site …

Four experiments were conducted to improve nonsurgical, ova recovery techniques in
superovulated cattle. The measure of collection efficiency (mean ova recovery index) was …

Three experiments tested the effects of six insemination regimens on embryo production in
superovulated cows. One, two or three inseminations with one unit of semen at each time …

Holstein calves, reared from birth under standard conditions, were given various
combinations of pmsg-lh or pmsg-hcg at 8 to 9 weeks, or at 17 weeks of age. Follicular …

Superovulation is a major limiting factor in the contributions that embryo transfer can make to
the genetic improvement of cattle. This review analyzes the limitations of superovulation of …

Superovulated beef cows and heifers were nonsurgically collected 6 to 8 days post estrus.
Commercial production results for 1976 through 1978 were 4979 pregnancies from 7814 …

The objective of this study was to evaluate the transferable embryo recovery rates from
superovulated donor cattle after different artificial insemination (AI) schedules. Sixty mixed …

Of 226 donor cattle treated with PMSG to induce superovulation, 76· 5% responded with 3 or
more ovulations. Flushing at surgery or slaughter 10–16 days after oestrus recovered eggs …

Mature beef cows of 13 major and several minor breeds were repeatedly superovulated by
injections of follicle stimulating hormone (FSH) and prostaglandin F2 alpha (PGF). Embryos …