title: Endometrial preparation for in vitro oocyte maturation: early use of estrogen increases endometrial tissue and requires lower daily dosage: a cross over trial in 'mock' cycles.
abstract: OBJECTIVE
  Determine if estrogen used since the beginning of the menstrual flow could improve endometrial tissue compared to standard endometrial preparation for in vitro maturation cycles.
  
  
  METHODS
  Twenty polycystic ovary syndrome women were submitted to two estrogen therapy schedules: standard schedule; estrogen began on the day of planned egg retrieval (dosage was based on endometrial thickness); and long schedule; estrogen began on the first day of menstruation. No oocyte retrieval or embryo transfer was performed. Three-dimensional ultrasound was performed on the day of planned egg retrieval and one week later for endometrial evaluation.
  
  
  RESULTS
  A higher endometrial thickness and volume was found in long schedule on both evaluations. The number of patients that have used 10 mg/day of estradiol was significant higher in the standard schedule (65%x0%). No other significant difference was found.
  
  
  CONCLUSIONS
  The early use of estrogen improves endometrial tissue and requires lower daily dosage.
authors.affiliation: Departamento de Ginecologia e Obstetrícia da Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brasil. wpmartins@gmail.com
authors.forename: Wellington de Paula
authors.initials: Wde P
authors.lastname: Martins
authors.forename: Rosana Maria
authors.initials: RM
authors.lastname: dos Reis
authors.forename: Rui Alberto
authors.initials: RA
authors.lastname: Ferriani
authors.forename: Carlos Henrique Medeiros
authors.initials: CH
authors.lastname: de Araújo
authors.forename: Carolina Oliveira
authors.initials: CO
authors.lastname: Nastri
authors.forename: Francisco Mauad
authors.initials: FM
authors.lastname: Filho
mesh_terms: D001158:Arteries / Q000000981:diagnostic imaging; D018592:Cross-Over Studies; D004394:Dydrogesterone / Q000627:therapeutic use; D004717:Endometrium / Q000098:blood supply / Q000000981:diagnostic imaging / Q000187:drug effects*; D004958:Estradiol / Q000031:analogs & derivatives* / Q000627:therapeutic use; D005260:Female; D006801:Humans; D006080:Ovarian Follicle / Q000187:drug effects / Q000502:physiology; D011085:Polycystic Ovary Syndrome / Q000503:physiopathology / Q000628:therapy*; D020554:Sperm Injections, Intracytoplasmic; D014463:Ultrasonography; D014599:Uterus / Q000098:blood supply / Q000000981:diagnostic imaging
chemical_list: D004958:Estradiol; D004394:Dydrogesterone