title: [The rate of morphologically normal sperm does not affect the clinical outcomes of conventional IVF in patients with one retrieved oocyte].
abstract: OBJECTIVE
  To investigate the influence of the rate of morphologically normal sperm (MNS) on the clinical outcomes of conventional in vitro fertilization (IVF) in patients with one retrieved oocyte.
  
  
  METHODS
  From January 2013 to January 2015, a total of 256 couples with one retrieved oocyte underwent conventional IVF in our center. According to the rate of MNS, the patients were divided into two groups: MNS < 4% (134 cycles) and MNS ≥ 4% (122 cycles). We compared the rates of no transferrable embryo cycles, fertilization, cleavage, normal fertilization, abnormal fertilization, high-quality embryo and transferrable embryo between the two groups. A total of 75 fresh embryo transfer cycles were performed, 43 in the MNS < 4% group and the other 32 in the MNS ≥ 4% group. We also compared the rates of implantation, clinical pregnancy and abortion between the two groups.
  
  
  RESULTS
  There were no statistically significant differences between the two groups in the rates of no transferrable embryo cycles, fertilization, cleavage, normal fertilization, abnormal fertilization, high-quality embryo and transferrable embryo (P > 0.05). The rates of implantation, clinical pregnancy and abortion exhibited no remarkable differences either in the fresh embryo transfer cycles between the two groups (P > 0.05).
  
  
  CONCLUSIONS
  The rate of MNS does not affect the clinical outcomes of conventional IVF in patients with one retrieved oocyte.
authors.forename: Ming-zhao
authors.initials: MZ
authors.lastname: Li
authors.forename: Xia
authors.initials: X
authors.lastname: Xue
authors.forename: Si-lin
authors.initials: SL
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.forename: Juan-zi
authors.initials: JZ
authors.lastname: Shi
mesh_terms: D000022:Abortion, Spontaneous; D002970:Cleavage Stage, Ovum; D010064:Embryo Implantation; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro / Q000379:methods / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D054315:Oocyte Retrieval; D011247:Pregnancy; D018873:Pregnancy Rate; D056826:Single Embryo Transfer / Q000706:statistics & numerical data*; D013076:Sperm Count; D013094:Spermatozoa / Q000502:physiology*