Effect of embryo transfer following artificial insemination (ETFAI) on reproductive performance in dairy cows in south-western Japan

• Published in: Journal of Veterinary Medical Science Vol. 72; no. 5; pp. 627 - 629
• Main Authors: Tani, M., Yamaguchi Univ. (Japan), Hayashida, T, Tomokawa, K, Mito, Y, Funakoshi, D, Tani, C, Sakatani, M, Takahashi, M, Kitahara, G, Kamimura, S
• Format: Journal Article
• Language: English
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 01.05.2010; Japan Science and Technology Agency
• Subjects: Animals; ARTIFICIAL INSEMINATION; BODY TEMPERATURE; Cattle; dairy cow; DAIRY COWS; Dairying - methods; EMBRYO TRANSFER; Embryo Transfer - methods; ET following AI; ETE; Female; Fertilization in Vitro - methods; Fertilization in Vitro - veterinary; fetal loss; http://www.fao.org/aos/agrovoc#c_15965; http://www.fao.org/aos/agrovoc#c_26767; http://www.fao.org/aos/agrovoc#c_4039; http://www.fao.org/aos/agrovoc#c_638; http://www.fao.org/aos/agrovoc#c_6510; http://www.fao.org/aos/agrovoc#c_7519; http://www.fao.org/aos/agrovoc#c_983; INSEMINACION ARTIFICIAL; INSEMINATION ARTIFICIELLE; JAPAN; JAPON; Male; PERFORMANCE DE REPRODUCTION; Pregnancy; Pregnancy, Animal - physiology; Progesterone - blood; rectal temperature; REPRODUCTIVE PERFORMANCE; REPRODUCTIVIDAD; Semen - physiology; SUMMER; summer period; TEMPERATURA DEL CUERPO; TEMPERATURE CORPORELLE; TRANSFERENCIA DE EMBRIONES; TRANSFERT EMBRYONNAIRE; VACAS LECHERAS; VACHE LAITIERE; VERANO; Japan
• ISSN: 0916-7250; 1347-7439
• DOI: 10.1292/jvms.09-0401

In order to improve the reproductive performance during the summer period, embryo transfer (ET; Japanese black embryo) following artificial insemination (AI; Holstein semen: ETFAI) was conducted in dairy cows in south-western Japan (n=56). The conception rate was improved in cows with ETFAI compared with conventional AI, which served as the control (n=195; 30.4% vs. 13.8%. P0.01). However, higher fetal loss was observed in ETFAI compared with the controls (38.1% vs. 7.4%, P0.05). Four cases of twin pregnancy resulted in 2 singletons and a set of twins. There was no difference in the plasma progesterone level on d0 or d7 (d0