Relationship of serum progesterone concentration, size and blood flow of the corpus luteum at the time of fixed time embryo transfer (FTET) on conception rate in bovine recipients

• Grant number: 18/12551-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2018
• End date: September 30, 2019
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Animal Reproduction
• Principal Investigator: Pietro Sampaio Baruselli
• Grantee: Juliana Vieira Paz
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The success of embryo transfer (ET) implies knowing the factors that can influence the fertility enhancement of embryo recipients for decision making in the art technique. The present study is evaluated on the day of data transfer of the life cycle, area, volume, CL blood flow and concentration of P4 and its correlations with a rate of. In contact with the company In Vitro Brasil-IVB (location in the municipality of Mogi Mirim, state of São Paulo), where 400 cross-breeding recipients (Angus x Nelore) belonging to farms, IVB company the embryos of the in vitro fertilization (IVF) technique. And in the second experiment, which will be carried out in collaboration with the company Fazenda Colorado (located in the state of São Paulo), will be used about 300 receivers of milk of the Holstein breed that will receive packages from the production of in vivo production of embryos. All cows should be submitted to a fixed-time data transfer protocol (TETF) and will be done in D17. This is an as well as collected analysis of the blood analysis for the ultrasonographic transrectal size analysis, the blood flux to CLEM, to identifications of factors that relevant influence to taxes of embryo receivers and milk.