title: Laboratory evaluation in oocyte cryopreservation suggests retrieved oocytes are comparable whether frozen for medical indications, deferred reproduction or oocyte donation.
abstract: OBJECTIVE
  to compare pre-cryo data from oocyte cryopreservation (OC) cycles performed for malignancy (MED) vs. elective deferment of reproduction (DR) or oocyte donation (OD).
  
  
  METHODS
  all patients were ≤40 y and underwent standard ovarian stimulation and retrieval. Prior to OC, meiotic spindle (MS) and zona pellucida (ZP) retardance was measured using digital polarized light microscopy (DPLM).
  
  
  RESULTS
  of 130 OC cycles, 49 were for MED, 73 for DR, and 8 for OD. Cycles completed for MED had an average of 9 ±1 spindle-positive oocytes with a mean MS retardance of 1.2  ± 02 nm and ZP retardance of 2.1 ± .06 nm, which was clinically comparable to the other groups.
  
  
  CONCLUSIONS
  women with malignancy can achieve adequate ovarian response and similar oocyte parameters to those of women undergoing fertility preservation for non-cancer indications. Such information, coupled with the ability to noninvasively study oocyte dynamics, may improve the counseling of cancer patients seeking fertility preservation.
authors.affiliation: Department of Obstetrics and Gynecology, NYU, New York, NY, USA.
authors.forename: Marie
authors.initials: M
authors.lastname: Werner
authors.forename: Andrea
authors.initials: A
authors.lastname: Reh
authors.forename: Patty Ann
authors.initials: PA
authors.lastname: Labella
authors.forename: Nicole
authors.initials: N
authors.lastname: Noyes
mesh_terms: D000328:Adult; D015925:Cryopreservation; D005260:Female; D006801:Humans; D018587:Oocyte Donation; D009865:Oocytes / Q000648:ultrastructure*; D010062:Ovulation Induction; D008941:Spindle Apparatus / Q000648:ultrastructure; D015044:Zona Pellucida / Q000648:ultrastructure