title: [Optimization of embryo production in cattle by aspiration of the fluid from large follicles before induction of superovulation with the assistance of an ovary puncture cannula].
abstract: During a field study at the Besamungsverein Neustadt a.d. Aisch rectal palpable large follicles were eliminated in 167 selected donor cows prior to superovulation induction. For this purpose a so-called "Ovarpunktionskanüle" was used, which allows after vaginal introduction the aspiration of follicle fluid from a rectal fixed ovary. From 152 flushed donor cows an average of 11.0 viable embryos was recovered. Using fresh semen from one problem bull for insemination of donors 13.2 viable embryos per flushing were collected in relation to 4.1 using frozen semen. At the same time the rate of unfertilized ova dropped from 9.8 to 3.5. The follicle aspiration with a so-called "Ovarpunktionskanüle" prior to superovulation induction is-from a practical viewpoint-superior to the dominant follicle removing with the help of transrectal ultrasonography.
authors.affiliation: Besamungsverein Neustadt a. d. Aisch.
authors.forename: H P
authors.initials: HP
authors.lastname: Nohner
authors.forename: J
authors.initials: J
authors.lastname: Hahn
authors.forename: R
authors.initials: R
authors.lastname: Hahn
mesh_terms: D000818:Animals; D002404:Catheterization / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D002417:Cattle / Q000502:physiology*; D004624:Embryo Transfer / Q000379:methods / Q000662:veterinary*; D005260:Female; D015571:Follicular Fluid; D008297:Male; D013396:Suction / Q000662:veterinary; D013480:Superovulation