title: Pregnancy rates in sequential in vitro fertilization cycles by oocyte donors(1).
abstract: OBJECTIVE
  To evaluate the clinical outcome of in vitro fertilization (IVF) treatment cycles from individual oocyte donors who underwent multiple sequential donations.
  
  
  METHODS
  We reviewed clinical outcome data from sequential anonymous oocyte donation cycles using donors who underwent multiple IVF stimulations. Donors were grouped by the interval between cycles and the cycle number (rank). The primary outcome measure was delivery rate by individual donor per retrieval from the combined derivative fresh and frozen embryo transfers.
  
  
  RESULTS
  Duration and amount of gonadotropin therapy and the fertilization rates did not correlate significantly with the interval between cycles or cycle rank. Cumulative delivered pregnancy rates for cycles 1-6 were 51.5%, 54.6%, 50.5%, 51.5%, 51.1%, and 57.6%, respectively. Delivered pregnancy rates did not vary by interval between cycles.
  
  
  CONCLUSIONS
  Young healthy presumed or proven fertile women can reliably donate oocytes for at least six cycles with the expectation of consistently high pregnancy rates.
authors.affiliation: Genetics and IVF Institute, Fairfax, Virginia, USA. mopsahl@givf.com
authors.forename: M S
authors.initials: MS
authors.lastname: Opsahl
authors.forename: K L
authors.initials: KL
authors.lastname: Blauer
authors.forename: S H
authors.initials: SH
authors.lastname: Black
authors.forename: A
authors.initials: A
authors.lastname: Dorfmann
authors.forename: R J
authors.initials: RJ
authors.lastname: Sherins
authors.forename: J D
authors.initials: JD
authors.lastname: Schulman
mesh_terms: D000293:Adolescent; D000328:Adult; D003120:Colorado; D005260:Female; D005307:Fertilization in Vitro / Q000706:statistics & numerical data*; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D016017:Odds Ratio; D018587:Oocyte Donation / Q000706:statistics & numerical data*; D011247:Pregnancy / Q000706:statistics & numerical data*