Harold D. Hafs
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Biology
Why Is Harold D. Hafs Influential?
(Suggest an Edit or Addition)Harold D. Hafs's Published Works
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Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author
Published Works
- Analysis of repeated measurements of animals. (1971) (871)
- Efficacy of an intravaginal progesterone insert and an injection of PGF2alpha for synchronizing estrus and shortening the interval to pregnancy in postpartum beef cows, peripubertal beef heifers, and dairy heifers. (2001) (255)
- Bovine serum estrogens, progestins and glucocorticoids during late pregnancy parturition and early lactation. (1973) (220)
- Suckling and four-times daily milking: influence on ovulation, estrus and serum luteinizing hormone, glucocorticoids and prolactin in postpartum holsteins. (1980) (144)
- Progesterone, LH, Estrus and Ovulation after Prostaglandin F2α in Heifers 1 (1973) (140)
- Estradiol and progesterone in blood serum during the bovine estrous cycle. (1972) (135)
- Response of cyclic and post-partum suckled cows to injections of synthetic LH-RH. (1977) (124)
- Serum luteinizing hormone, prolactin, glucocorticoid, and progestin in dairy cows from calving to gestation. (1973) (107)
- Testicular and blood plasma androgens in Holstein bulls from birth through puberty. (1972) (106)
- Estrus and luteal function in suckled beef cows that were anestrous when treated with an intravaginal device containing progesterone with or without a subsequent injection of estradiol benzoate. (1997) (105)
- Induced and synchronized estrus in cattle: dose titration of estradiol benzoate in peripubertal heifers and postpartum cows after treatment with an intravaginal progesterone-releasing insert and prostaglandin F2alpha. (1998) (103)
- Ovarian characteristics and serum LH, prolactin, progesterone and glucocorticoid from first estrus to breeding size in Holstein heifers. (1972) (98)
- Age and breed differences in thyroid hormones, insulin-like growth factor (IGF)-I and IGF binding proteins in female horses. (1996) (94)
- The hypothalamo-pituitary gonadotrophic axis of suckled and nonsuckled dairy cows postpartum. (1980) (92)
- Intrauterine Administration of Prostaglandin F2α in Cows: Progesterone, Estrogen, LH, Estrus and Ovulation1 (1974) (86)
- Estrus, ovulation, and serum progesterone, estradiol, and LH concentrations in mares after an increased photoperiod during winter. (1977) (86)
- Prepartum grain feeding effects on milk production, mammary edema, and incidence of diseases. (1969) (82)
- Serum hormone patterns associated with growth and sexual development in bulls. (1979) (79)
- Control of the Estrous Cycle with Prostaglandin F in Cattle and Horses (1974) (77)
- Pituitary and plasma growth hormone levels in bulls from birth to one year of age. (1970) (76)
- Maturation of bovine female genitalia from birth through puberty. (1969) (71)
- The cycle of oestrus, ovulation and plasma levels of hormones in the mare. (1975) (68)
- Blood serum testosterone after sexual preparation or ejaculation, or after injections of LH or prolactin in bulls. (1973) (67)
- Sperm Capacitation by Uterine Fluid or Beta-Amylase in vitro (1965) (65)
- Bovine Serum LH, GH, and Prolactin During Late Pregnancy, Parturition and Early Lactation 1 (1973) (60)
- Androgen Secretion and Spermatogenesis in Rats Following Semistarvation 1 (1971) (60)
- Onset of oestrus and fertility of dairy heifers and suckled beef cows treated with prostaglandin F 2α (1975) (59)
- Sperm Output of Dairy Bulls with Varying Degrees of Sexual Preparation (1962) (57)
- Serum luteinizing hormone, testosterone and androstenedione in pubertal and prepubertal bulls after gonadotropin releasing hormone. (1975) (55)
- Acute effects of short-term feed deprivation and refeeding on circulating concentrations of metabolites, insulin-like growth factor I, insulin-like growth factor binding proteins, somatotropin, and thyroid hormones in adult geldings. (1997) (55)
- Libido, Sperm Characteristics, Sperm Output, and Fertility of Mature Dairy Bulls Ejaculated Daily or Weekly for Thirty-Two Weeks (1959) (54)
- Variation of Estimated Numbers of Milk Somatic Cells Stained with Wright's Stain or Pyronin Y – Methyl Green Stain (1963) (51)
- Serum hormonal changes and testicular response to LH during puberty in bulls. (1979) (51)
- Gonadal and extra gonadal sperm numbers during reproductive development of holstein bulls. (1968) (48)
- Luteolysis, estrus and ovulation, and blood prostaglandin F after intramuscular administration of 15, 30 or 60 mg prostaglanding F2alpha. (1975) (48)
- Feed intake, body weight, body condition score, musculation, and immunocompetence in aged mares given equine somatotropin. (1997) (47)
- ANTIGENICITY AND CROSS-REACTIONS OF BOVINE SPERMATOZOA. (1964) (46)
- Serum levels of LH, prolactin and growth hormone after ejaculation in bulls. (1971) (46)
- Comparison of testosterone and androstenedione secretion in bulls given prostaglandin F2alpha luteinizing hormone. (1978) (45)
- Negative feedback control of bovine serum luteinizing hormone (LH) concentration from completion of the preovulatory LH surge until resumption of luteal function. (1977) (45)
- Corpus luteum growth and progesterone synthesis during the bovine estrous cycle. (1968) (45)
- A review: relationships of some hormones to growth and carcass quality of ruminants. (1971) (42)
- Plasma Prolactin, Growth Hormone, Luteinizing Hormone and Glucocorticoids After Prostaglandin F2α in Heifers 1 (1974) (41)
- Levels of pituitary FSH and LH in heifers from birth through puberty. (1968) (40)
- Reproductive tract of Holstein bulls from bith through puberty. (1969) (40)
- Serum growth hormone, LH and prolactin in the pregnant cow. (1972) (39)
- Estrus, Ovulation, Progesterone and Luteinizing Hormone after Prostaglandin F2α in Mares 1 (1974) (38)
- Pituitary and hypothalamic endocrine changes associated with reproductive development of Holstein bulls. (1968) (38)
- Distribution of sperm in male rabbits after various ejaculation frequencies (1967) (37)
- LH and prolactin in blood serum from estrus to ovulation in Holstein heifers. (1971) (37)
- Chronic recombinant equine somatotropin (eST) administration does not affect aerobic capacity or exercise performance in geriatric mares. (1998) (37)
- Androgens in the Bovine Fetus and Dam 1 (1975) (36)
- Synchronization of ovulation and fertility in weaned sows treated with intravaginal triptorelin is influenced by timing of administration and follicle size. (2011) (35)
- Some Endocrine Influences on the Growth and Carcass Quality of Holstein Heifers (1971) (35)
- Competitive protein binding and radioimmunoassay for testosterone in bulls and rabbits; blood serum testosterone after injection of LH or prolactin in rabbits. (1973) (35)
- Luteal function and estrus in peripubertal beef heifers treated with an intravaginal progesterone releasing device with or without a subsequent injection of estradiol. (1998) (34)
- LH, prolactin, estradiol and progesterone in bovine blood serum during early pregnancy. (1973) (34)
- Estrus in Relation to Time of Administration of Prostaglandin F2α to Heifers1 (1978) (33)
- Release of Bovine Luteinizing Hormone by Purified Porcine and Synthetic Gonadotropin Releasing Hormone 1 (1973) (32)
- Thyroid function in the prenatal and neonatal bovine. (1972) (32)
- Semen Output of Rabbits Ejaculated After Varying Sexual Preparation.∗ (1967) (31)
- Increased Sperm Numbers in the Deferent Duct after Prostaglandin F2α in Rabbits 1 (1974) (30)
- Growth, mammary, reproductive, and pituitary hormone characteristics of Holstein heifers fed extra grain and melengestrol acetate. (1972) (28)
- Some chemical, immunochemical and electrophoretic properties of bovine follicular fluid. (1966) (28)
- Increased sperm output of rabbits and bulls treated with prostaglandin F2 alpha. (1974) (28)
- Endocrine, ovulatory and reproductive characteristics of sows treated with an intravaginal GnRH agonist. (2010) (28)
- Early changes in serum progesterone, estradiol and LH during prostaglandin F2alpha-induced luteolysis in mares. (1978) (27)
- Pituitary and gonadal hormones associated with fertile and nonfertile inseminations at synchronized and control estrus. (1973) (27)
- Control of estrus with prostaglandin F2alpha in mares: minimal effective dose and stage of estrous cycle. (1975) (26)
- Ovulation rates and litter sizes in sexually receptive and nonreceptive artificially inseminated rabbits given varying dosages of luteinizing hormone. (1963) (26)
- Sperm output of rabbits at various ejaculation frequencies and their use in the design of experiments. (1968) (26)
- Increased blood LH and testosterone after administration of prostaglandin F2alpha in bulls. (1976) (25)
- CONTROLLED BREEDING IN CATTLE: A REVIEW (1976) (25)
- Some carcass quality and endocrine criteria of Holstein heifers fed melengestrol acetate. (1971) (25)
- Testicular and Epididymidal Sperm Numbers in Unilaterally Vasoligated Rabbits∗ (1969) (24)
- Pituitary and hypothalamic endocrine changes during the bovine estrous cycle. (1969) (23)
- Onset of oestrus after prostaglandin F-2alpha in cattle (1975) (22)
- Body size of calves from holstein dams and sired by holstein or angus bulls. (1965) (22)
- Stimulation effect of prostaglandin F2ALPHA on the plasma concentration of testosterone in bulls. (1975) (22)
- Luteolysis, growth hormone, glucocorticoids, prolactin and milk production in lactating dairy cows given prostaglandin F2alpha. (1978) (22)
- IMMUNOCHEMICAL AND ELECTROPHORETIC PROPERTIES OF OESTROUS RABBIT UTERINE FLUID PROTEINS OBTAINED BY UTERINE LIGATION. (1964) (22)
- Gonadal and extragonadal sperm reserves after unilateral vasoligation in rabbits. (1968) (21)
- Blood LH after PGF2α in diestrous and ovariectomized cattle (1975) (21)
- Pubertal relationships of some endocrine and reproductive criteria in Hereford bulls. (1971) (21)
- Plasma luteinzing hormone, progestogens, and estrogens in mares during gestation, parturition, and first postpartum estrus (foal estrus). (1978) (20)
- Luteolysis Induced by Prostaglandin F2α Before and After Hysterectomy in Heifers (1977) (20)
- COMPARISON OF METHODS FOR ESTIMATING MILK SOMATIC CELLS. (1965) (19)
- Luteinizing Hormone Release by Gonadotropin Releasing Hormone Before and After Castration in Bulls 1 (1974) (19)
- Guidelines for hormone radioimmunoassays. (1977) (18)
- Serum Insulin, Glucose, and Free Fatty Acids in the Cow and Fetus during Gestation 1 (1974) (18)
- Estimation of Some Variance Components of Bovine Semen Criteria and Their Use in the Design of Experiments (1958) (18)
- Photoelectric Method for Estimating the Concentration of Sperm in Boar Semen (1960) (18)
- The Effect of Methods of Adding Egg Yolk and Monosaccharides on the Survival of Frozen Bull Spermatozoa (1955) (17)
- CONTROL OF OVULATION, FERTILITY AND ENDOCRINE RESPONSE AFTER PROSTAGLANDIN F2α IN CATTLE (1975) (17)
- A review of prostaglandin F2alpha for ovulation control in cows and mares. (1974) (16)
- Anterior Pituitary Levels of FSH, LH, ACTH and Prolactin After Mating in Female Rabbits.∗ (1967) (16)
- Fertility of bull semen with added amylase. (1968) (15)
- Fertility of heifers and suckled cows inseminated at predetermined intervals after treatment with prostaglandin F2α (1978) (15)
- Studies on the effect of unilateral and bilateral castration on plasma testosterone and LH levels in the bull. (1976) (15)
- Release of pituitary hormones, cortisol, testosterone and insulin in response to prostaglandin F2 alpha given during intracarotid infusion of somatostatin in bulls. (1977) (15)
- Relationship of Feulgen-DNA in milk to number of milk somatic cells (1963) (15)
- Effect of chronic administration of gonadotrophin releasing hormone and thyrotrophin releasing hormone to pubertal bulls on plasma luteinizing hormone, prolactin and testosterone concentrations, the number of epididymal sperm and body weight. (1977) (14)
- Pulsatile release of somatotropin related to meal feeding and somatotropin response to secretagogues in horses. (1997) (14)
- Estrous behavior and ovarian activity in peripuberal heifers. (1976) (13)
- Fertility of bull semen with added beta-glucuronidase. (1971) (13)
- LEVELS OF SOME NORMAL CONSTITUENTS OF BULL SEMEN DURING REPETITIVE EJACULATION. (1964) (13)
- Effect of intracarotid infusion of prostaglandin F2alpha on plasma luteinizing hormone, testosterone and glucocorticoid concentrations in bulls. (1977) (13)
- The Influence of High-Fat Diets on Estrous Cycles, Sperm Production and Fertility of Rats 1 (1973) (13)
- Feulgen-DNA in milk as a measure of udder irritation (1962) (13)
- Motility and Fertility during Post-Thawing Storage of Bovine Spermatozoa Frozen Concentrated, Thawed, and Re-Extended (1962) (13)
- Sperm output and serum testosterone in rabbits given prostaglandin F2α or E2 (1978) (13)
- Some semen characteristics in dairy bulls ejaculated with artificial vaginas at varying temperatures. (1966) (12)
- Fertility of Cattle Inseminated with 12, 24 or 35 Million Sperm in 0.5 or 0.9 Milliliter (1970) (12)
- Prostaglandin F2alpha overcomes blockade of episodic LH secretion with testosterone, melengestrol acetate or asprin in bulls. (1977) (12)
- Galvanic separation of X- and Y-chromosome-bearing sperm. (1971) (12)
- Effect of prostaglandin E2 and F2alpha on serum luteinizing hormone, testosterone and prolactin in bulls. (1978) (11)
- On the safety of estrogenic hormone residues in edible animal products. (1975) (11)
- Low-fat meats : design strategies and human implications (1994) (11)
- VOLUME, PH AND PROTEIN CONTENT OF FLUIDS FROM LIGATED UTERI OF OESTROUS RABBITS. (1964) (11)
- INFLUENCE OF THYROTROPIN-RELEASING HORMONE (TRH) ON PLASMA PROGESTERONE AND PITUITARY HORMONE CONCENTRATIONS IN CATTLE (1975) (10)
- Fertility of Bull Sperm with Added Catalase (1961) (9)
- Serum LH and testosterone and sperm numbers in pubertal bulls chronically treated with gonadotropin releasing hormone. (1975) (9)
- Biochemical and morphological changes in bovine tubular genitalia during the estrous cycle. (1969) (9)
- Sperm Capacitation after Injection of LH or HCG in Rabbits 1 (1970) (9)
- Oestrus, ovulation and plasma hormones after prostaglandin F2alpha in mares. (1975) (9)
- Seminal Composition and Sexual Activity after Castration and Testosterone Replacement in Rabbits∗ (1969) (9)
- RELATIONSHIP OF FEULGEN-DNA IN MILK AND OF MILK QUALITY TEST (MQT) TO THE NUMBER OF MILK SOMATIC CELLS1 (1964) (9)
- Testicular function in bulls 10 weeks after unilateral vasectomy. (1974) (8)
- Sperm capacitation by uterine fluid or beta-amylase in vitro. (1966) (8)
- Hormonal control of reproduction in cattle (1975) (8)
- Luteinizing hormone, prolactin, and interval to ovulation after melengestrol acetate in cattle. (1973) (7)
- Synchronization of Estrus in Beef Cows and Beef and Dairy Heifers with Intravaginal Progesterone Inserts and Prostaglandin F2α with or Without Gonadotropin-Releasing Hormone1 (2003) (7)
- Bovine Fetal Pituitary Concentration and In Vitro Synthesis of Prolactin, GH, and LH 1 (1972) (7)
- Intrauterine administration of prostaglandin F2 alpha in cows: progesterone, estrogen, LH, estrus and ovulation. (1974) (6)
- Levels of some normal constituents of rabbit semen during repetitive ejaculation. (1966) (6)
- Termination of a bovine pregnancy complicated by mummified foetus (1974) (6)
- A philosophy of research and graduate training (1990) (6)
- A Comparison of Fertility of Bovine Spermatozoa Stored at 5° C. and −79° C (1954) (6)
- Androgens in the bovine fetus and dam (38567). (1975) (5)
- Serum Growth Hormone Levels of Pigs Fed Diethylstilbestrol Plus Methyltestosterone between 23 and 90 Kilograms (1973) (5)
- SOME PHYSICOCHEMICAL PROPERTIES OF SALINE-SOLUBLE PROTEINS IN BOVINE SPERMATOZOA. (1964) (5)
- Luteolysis induced by prostaglandin F2 alpha before and after hysterectomy in heifers. (1977) (4)
- Serum glucocorticoids, growth hormone and insulin and plasma glucose in bulls given prostaglandin E2 or F2 alpha 1. (1979) (4)
- Pituitary and blood plasma levels of gonadotropin after ovariectomy of heifers. (1971) (4)
- Relationship of glycerylphosphorylcholine to other constituents of bull semen. (1967) (4)
- Promoting Cooperation to Enhance Teaching with Technology1 (2005) (4)
- Sperm output and serum testosterone in rabbits given prostaglandin F2alpha or E2. (1978) (3)
- Glucocorticoid secretion in heifers given prostaglandin F2alpha after triamcinolone acetonide pretreatment. (1978) (3)
- Progestin and sterol synthesis by rabbit ovarian interstitial tissue in response to mating or injection of gonadotropin. (1971) (3)
- Fertility and Embryo Survival After Administration of Melengestrol Acetate in Rabbits 1 (1973) (3)
- Follicle-stimulating hormone, luteinizing hormone and prolactin potency of bovine pituitaries after various methods of preservation. (1966) (2)
- Introduction to Discussion (1966) (2)
- Proceedings: Pituitary control of testicular function in bulls (1974) (2)
- Progestin and Sterol Synthesis by Rabbit Ovarian Interstitial Tissue in Response to LH in Vivo and in Vitro 1 (1971) (2)
- Blood LH after PGF2alpha in diestrous and ovariectomized cattle. (1975) (2)
- Effect of intracarotid infusion of prostaglandin F2alpha on plasma prolactin and growth hormone in bulls. (1978) (2)
- Fertility of rabbits after melengestrol acetate administration. (1970) (2)
- A Futuristic Look into Reproductive Management (1985) (2)
- Synchrony and conception to insemination or embryo transfer in beef females treated with an intravaginal progesterone releasing device with or without an injection of estradiol (1999) (2)
- Capacitation of spermatozoa and fertility of bull sperm with added amylase. (1968) (2)
- Sex ratios of calves from inseminations after electrophoresis of sperm. (1974) (1)
- Sex control in cattle. (1968) (1)
- The effects of various diluents on freezing bull semen and re-extending it after thawing. (1960) (1)
- EMPIRICAL ESTIMATES OF POWER FOR BINOMIAL DATA WITH MIXED MODELS (1997) (1)
- Abortion after PGF2α in heifers with multiple pregnancies following superovulation with FSH and PGF2α (1978) (1)
- Some assay restrictions on inferences made from determining hormones in horses, cows, and their fetuses. (1976) (1)
- Proceedings: Progesterone prevents luteinizing hormone release during luteolysis induced by prostaglandin F2alpha. (1976) (0)
- Meeting-ReportCall for Papers for the 1981 Annual Meeting of The American Dairy Science Association (1980) (0)
- Sperm Capacitation Assay in Superovulated Rabbits with Uterine or Oviducal Inseminations 1 (1971) (0)
- THE EFFECTS OF PROLONGED CHLORPROMAZINE ADMINISTRATION ON THE REPRODUCTIVE ORGANS IN THE MALE GOAT. (1964) (0)
- Induction of Estrus in Anestrous Suckled Beef Cows (1998) (0)
- Estrus in relation to time of administration of prostaglandin F2alpha to heifers. (1978) (0)
- BLOOD SERUM TESTOSTERONE IN BULLS TABLE 2 (2007) (0)
- Carcass Quality of Ruminants A Review: Relationships of Some Hormones to Growth and (2011) (0)
- Call for Papers for the 1981 Annual Meeting of The American Dairy Science Association (1980) (0)
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What Schools Are Affiliated With Harold D. Hafs?
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