Robert S. Youngquist
Acting Department Chair, Associate Chair for Academic Affairs,
     and Professor of Theriogenology

· DVM, Iowa State University, Ames, IA

· Diplomate, American College of Theriogenologists (ACT)

YoungquistR@missouri.edu

Research emphasis:

Research projects have focused upon investigations of clinical abnormalities of reproduction in cattle, horses and other domestic animals. Major focus has been on normal and abnormal ovarian function in cattle, primarily cystic ovarian disease in dairy cows.

JH Hampton, JF Bader, WR Lamberson, MF Smith, RS Youngquist, HA Garverick.  Gonadotropin requirements for dominant follicle selection in GnRH agonist-treated cows.  Reproduction (2004) 127(6): 695-703.

Kieborz-Loos KR, HA Garverick, DH Keisler, SA Hamilton, BE Salfen, RS Youngquist, MF Smith. Oxytocin-induced secretion of prostaglandin F2alpha in postpartum beef cows: effects of progesterone and estradiol-17beta treatment. J Anim Sci (2003) 81(7):1830-36. [Abstract]

Keough T, RS Youngquist, MP Lacey.  Sulfonic acid derivatives for peptide sequencing by MALDI MS. Anal Chem (2003) 1;75(7):156A-65A [Abstract]

Belyea RL, RD Curry, GA Mesyats, AL Filatov, TE Clevenger, MA Miller, RS Youngquist: Effects of x-rays on growth and germinal tissue of calves. J Dairy Sci (2001) 84:2777-2781

Manikkam M, MD Calder, BE Salfen, RS Youngquist, DH Keisler, HA Garverick.  Concentrations of steroids and expression of messenger RNA for steroidogenic enzymes and gonadotropin receptors in bovine ovarian follicles of first and second waves and changes in second wave follicles after pulsatile LH infusion. Anim Reprod Sci (2001) 67(3-4):189-203.  (Erratum in: Anim Reprod Sci (2001) 31;68(1-2):133 [Abstract]

Manikkam M, B Bao, CS Rosenfeld, X Yuan, BE Salfen, MD Calder, RS Youngquist, DH Keisler, DB Lubahn, HA Garverick: Expression of bovine oestrogen receptor-ß (bERß) messenger ribonucleic acid (mRNA) during the first ovarian follicular wave and lack of change in the expression of bERß mRNA of second wave follicles after LH infusion into cows. Anim Reprod Sci (2001) 67:159-69. [Abstract]

Calder MD, M Manikkam, BE Salfen, RS Youngquist, DB Lubahn, WB Lamberson, HA Garverick: Dominant bovine ovarian follicular cysts express increased levels of messenger RNAs for luteinizing hormone receptor and 3ß-hydroxysteroid dehydrogenase delta4, delta5 isomerase compared to normal dominant follicles. Biol Reprod (2001) 65:471-6. [Abstract]

Evans TJ, VK Ganjam, MA Miller, KD Niswender, WJ Krause, RS Youngquist: Relationship between the degree of endometrial periglandular fibrosis and the presence of angiotensin-converting enzyme in the equine endometrium. J Reprod Fert Suppl (2000) 56:393-398.

Calder MD, BE Salfen, B Bao, RS Youngquist, HA Garverick: Administration of progesterone to cows with ovarian follicular cysts results in a reduction in mean LH and LH pulse frequency in initiates ovulatory follicular growth. J Anim Sci (1999) 77:3037-42. [Abstract]

Bilby CR, JF Bader, BE Salfen, RS Youngquist, CN Murphy, HA Garverick, BA Crooker, ME Lucy:  Plasma GH, IGF-1, and conception rate in cattle treated with low doses of recombinant bovine GH. Theriogenology (1999) 51:1285-96. [Abstract]

Youngquist RS: Pregnancy diagnosis.  In: Youngquist RS (ed): Current Therapy in Large Animal Theriogenology, WB Saunders Co, Philadelphia, 1997, pp 295-303

Youngquist RS: Parturition and dystocia.  In: Youngquist RS (ed): Current Therapy in Large Animal Theriogenology, WB Saunders Co, Philadelphia, 1997, pp 309-24

Youngquist RS, Shore MD: Postpartum uterine infections.  In: Youngquist RS (ed): Current Therapy in Large Animal Theriogenology, WB Saunders Co, Philadelphia, 1997, pp 335-40.

Youngquist RS: Surgical correction of abnormalities of the genital organs of cows.  In: Youngquist RS (ed): Current Therapy in Large Animal Theriogenology, WB Saunders Co, Philadelphia, 1997, pp 429-40.

Youngquist RS and WF Braun Jr: Abnormalities of the tubular genital organs.  In: WF Braun and RS Youngquist (eds): Veterinary Clinics of North America: Food Animal Practice, WB Saunders Co, Philadelphia, 1993, Volume 9, Number 2, pp 309-322.