The Possibility of Early Estimation for Fertility in Bovine Heterosexual Twin Females

• Published in: Journal of Veterinary Medical Science Vol. 59; no. 3; pp. 221 - 222
• Main Authors: SATOH, Shinya, HIRATA, Toh-Ichi, MIYAKE, Yoh-Ichi, KANEDA, Yoshihiro
• Format: Journal Article
• Language: English
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 1997; Japan Science and Technology Agency
• Subjects: Aging - blood; Aging - physiology; Animals; Cattle - blood; Cattle - physiology; Chorionic Gonadotropin - pharmacology; Estradiol - blood; Female; Fertility - physiology; fertility test; freemartin; Freemartinism - blood; Freemartinism - physiopathology; Gonadotropins, Equine - pharmacology; Humans; Immunoenzyme Techniques - veterinary; Karyotyping; Predictive Value of Tests; Progesterone - blood; Radioimmunoassay - veterinary; sex hormone; Time Factors; Twins, Dizygotic
• ISSN: 0916-7250; 1347-7439
• DOI: 10.1292/jvms.59.221

To diagnose the possibility of early estimation for fertility in bovine heterosexual twin females, we designed a new diagnostic program. The 9 freemartins (FM) and 5 normal females (Normal) were used in this study. All 14 cases, at 4 months of age, were given Pregnant Mare Serum Gonadotrophin (PMSG) and human Chorionic Gonadotrophin (hCG) 1.5-2 days later. Thereafter, the concentration of estradiol-17β (E2) was determined by RIA, and that of progesterone (P) was done by RIA and EIA (Ovcheck EIA Kit). The concentration of E2 in the Group of Normal rapidly increased after administration of PMSG, but in the Group of FM, the concentration of E2 changed in very low levels over 14 days. The concentration of P in the Group of Normal rapidly increased after administration of PMSG, but in the Group of FM, the concentration of P changed in very low levels over 14 days.