Fertility of lactating dairy cows inseminated with sex‐sorted or conventional semen after Ovsynch, Presynch–Ovsynch and Double‐Ovsynch protocols

Contents The objective was to compare pregnancy per artificial insemination (P/AI) with conventional (CS) or sex‐sorted semen (SS) in dairy cows subjected to one of the three timed AI protocols. Cows (n = 356) were randomly assigned to synchronization with Ovsynch (OVS), Presynch–Ovsynch (PO) or Dou...

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Veröffentlicht in:	Reproduction in domestic animals 2019-02, Vol.54 (2), p.309-316
Hauptverfasser:	Karakaya‐Bilen, Ebru, Yilmazbas‐Mecitoglu, Gulnaz, Keskin, Abdulkadir, Guner, Barıs, Serim, Enes, Santos, José E. P., Gümen, Ahmet
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Artificial insemination Breeding Cattle Dairy cattle dairy cow Dinoprost - pharmacology Estrus Synchronization - methods Female Fertility Flow Cytometry Gonadotropin-Releasing Hormone - pharmacology Insemination, Artificial - veterinary Lactation ovsynch Postpartum Pregnancy Pregnancy Rate presynchronization Progesterone - pharmacology Random Allocation Reproduction (biology) Semen Semen - drug effects Sex sex‐sorted semen Synchronism Synchronization Ultrasonography
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Zusammenfassung:	Contents The objective was to compare pregnancy per artificial insemination (P/AI) with conventional (CS) or sex‐sorted semen (SS) in dairy cows subjected to one of the three timed AI protocols. Cows (n = 356) were randomly assigned to synchronization with Ovsynch (OVS), Presynch–Ovsynch (PO) or Double‐Ovsynch (DO) and inseminated on Day 77 ± 3 postpartum with either frozen‐thawed SS (n = 182) or CS (n = 184) of the same bull. More cows were cyclic at the beginning of breeding Ovsynch increased (p
ISSN:	0936-6768 1439-0531
DOI:	10.1111/rda.13363