title: Percentage of Blastulation on the Number and Function of Metaphase II Oocytes.
abstract: OBJECTIVE
  Establish the number of metaphase II oocytes that are needed for optimum blastulation rate and to achieve a better rate of gestation.
  
  
  METHODS
  Retrospective study. Women diagnosed with infertility. There were 110 women submitted to IVF/ICSI, excluding third day transfers and those with canceled cycles. After controlled ovarian stimulation, cultivation continued to blastocysts.
  
  
  RESULTS
  Average age of the patients: 33.41. IVF technique: 73 patients, 66.4%; ICSI: 37 patients, 33.6%. Pregnancy: gestation: 57.3%; Non-gestation: 42.7%. Mean number of oocytes in metaphase II: 7.5.
  
  
  CONCLUSIONS
  The gestation rate coincides with the center's results (50-60%), reached with 7 mature oocytes. Mean blastulation rate was 39.2%.
authors.affiliation: Unidad de Fertilidad - Hospital Alcívar - Guayaquil, Ecuador.
authors.forename: Martha L
authors.initials: ML
authors.lastname: Chadid
authors.affiliation: Unidad de Fertilidad - Hospital Alcívar - Guayaquil, Ecuador.
authors.forename: Jorge
authors.initials: J
authors.lastname: Carpio
authors.affiliation: Unidad de Fertilidad - Hospital Alcívar - Guayaquil, Ecuador.
authors.forename: Pedro
authors.initials: P
authors.lastname: Valdivieso
authors.affiliation: Unidad de Fertilidad - Hospital Alcívar - Guayaquil, Ecuador.
authors.forename: Milton
authors.initials: M
authors.lastname: Zambrano
authors.affiliation: Unidad de Fertilidad - Hospital Alcívar - Guayaquil, Ecuador.
authors.forename: Javier
authors.initials: J
authors.lastname: García-Ferreyra
authors.affiliation: Unidad de Fertilidad - Hospital Alcívar - Guayaquil, Ecuador.
authors.forename: Pedro
authors.initials: P
authors.lastname: Valdivieso-Mejía
keywords: ICSI (Intracytoplasmic Sperm Injection); IVF (In Vitro Fertilization)