title: The influences of weather on patients with different ovarian responses in the treatment of assisted reproductive technology.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the influences of tropical weather on patients with different ovarian responses in the treatment of assisted reproductive technology.
  
  
  METHODS
  Six-hundred fourty-seven women underwent their first treatment cycles were retrospectively analyzed. Patients received embryo transfer either 3 days or 5 days after oocyte retrieval, depending on the number and quality of embryos on day-2.
  
  
  RESULTS
  Significant correlations were demonstrated in the top quality embryo rates of day-3 and day-5 embryo transfers with temperature, humidity, and atmosphere pressure. The cumulative light hours negatively correlated with the implantation and pregnancy rates of day-3 embryo transfer (-.282 and -.282, respectively), while they positively correlated with those of day-5 embryo transfer (.225 and .224, respectively).
  
  
  CONCLUSIONS
  These results clearly suggest that weather may exert influences on the outcome of assisted reproductive technology. Patients with different ovarian responses or blastocyst culture and transfer may modify weather influences.
authors.affiliation: Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, 123 Ta-Pei Road, Niaosung Hsiang, Kaohsiung County, Taiwan. willcw@adm.cgmh.org.tw
authors.forename: Shiuh Y
authors.initials: SY
authors.lastname: Chang
authors.forename: Kuo-Chung
authors.initials: KC
authors.lastname: Lan
authors.forename: Chih-Wei
authors.initials: CW
authors.lastname: Chen
authors.forename: Fu-Jen
authors.initials: FJ
authors.lastname: Huang
authors.forename: Men-Yi
authors.initials: MY
authors.lastname: Tsai
authors.forename: Chih-Yang
authors.initials: CY
authors.lastname: Chang
mesh_terms: D000328:Adult; D010064:Embryo Implantation / Q000502:physiology*; D004624:Embryo Transfer; D005260:Female; D006801:Humans; D008297:Male; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D012189:Retrospective Studies; D012621:Seasons; D020554:Sperm Injections, Intracytoplasmic; D013624:Taiwan; D013997:Time Factors; D014329:Tropical Climate; D014887:Weather