Fertility programs for lactating dairy cows: A novel presynch + timed artificial insemination program (Double E-Synch) produces similar ovarian dynamics, synchronization, and fertility as Double-Ovsynch

• Published in: Journal of dairy science Vol. 108; no. 4; pp. 4435 - 4447
• Main Authors: Consentini, Carlos E.C., Abadia, Tattiany, Galindez, Juan P.A., Lopes, Ana L.M., Ferro, Pedro P.C., Pazini, Yasmim E., Faria, Natalia V., Machado, Fernando, Capella, Tuanne, dos Santos, Tiago N., Duarte, Marcelo, Ferreira, Paulo P., Matos, Luiz M.F., Ferreira, Danilo R., Campos, Ernane, Prata, Alexandre, Melo, Leonardo F., Wiltbank, Milo C., Sartori, Roberto
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.04.2025; Elsevier
• Subjects: acetates; Animals; artificial insemination; Cattle; cloprostenol; corpus luteum; dairy cow; dairy science; estradiol; estrus; Estrus Synchronization - methods; Female; fertility; Fertility - drug effects; Gonadotropin-Releasing Hormone - administration & dosage; Insemination, Artificial - methods; Insemination, Artificial - veterinary; Lactation; Ovary - drug effects; Ovary - physiology; ovulation; Pregnancy; progesterone; Progesterone - administration & dosage; Progesterone - pharmacology; synchronization; timed artificial insemination; synchronization; dairy cow; timed artificial insemination; fertility
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.2024-25221

Fertility programs were implemented for the first postpartum timed artificial insemination (TAI) in 800 (primiparous and multiparous) lactating dairy cows, evaluating 2 presynchronization (presynch) strategies and 2 TAI protocols, in a 2 × 2 factorial arrangement. Weekly, cows were enrolled into 1 o...