title: Male age influences oocyte-donor program results.
abstract: BACKGROUND
  The purpose of our research was to examine the relationship between male age and semen parameters in a range of ages (from 20s to 60s) in Egg Donation Program (EDP) cycles. EDP provides a pool of high quality oocytes, thus allowing better analysis of the sperm efficacy.
  
  
  CONCLUSIONS
  The retrospective study population consisted of 484 male partners of patients undergoing EDP in in-vitro fertilization (IVF) treatments. A comparison was made of male age and sperm parameters within two groups: cycles resulting in a pregnancy (pregnant group) and cycles which failed to achieve a pregnancy (non-pregnant group). The men involved in the pregnant group were found to be significantly younger 43.2 +/- 8.1 than those of the nonpregnant group 46.81 +/- 7.8 (p = 0.003). Analysis of sperm morphology revealed a significant prevalence of teratozoospermia in males of the non-pregnant group, as compared to the males of the pregnant group (29% vs. 11%, respectively). The results also demonstrate that sperm parameters are apparently not diminished until men reach the age of 40. However, between 40-50 years old semen parameters deteriorate. Male age was found to be related to a reduction in sperm strict criteria: 44.8 in normozoospermia, 47.9 (p = 0.02), 48.4 (p = 0.04) and 51.9 (p = 0.001) years old in mild teratozoospermia, moderate teratozoospermia and severe teratozoospermia, respectively. Additionally, the results showed that the percentage of "healthy" embryos on day 3 of embryo culture was lower in the non-pregnant group (26%), as compared with the pregnant group (34%; p = 0.01).
  
  
  CONCLUSIONS
  Our study confirms that sperm parameters are reduced by age and suggests that this age-dependent effect could be a reason for failures in IVF cycles even in EDP couples.
authors.affiliation: Fertility Center, Assuta Medical Center, Rishon LeZion 57653, Israel. eligirsh@yahoo.com
authors.forename: Eliezer
authors.initials: E
authors.lastname: Girsh
authors.forename: Nathan
authors.initials: N
authors.lastname: Katz
authors.forename: Leonid
authors.initials: L
authors.lastname: Genkin
authors.forename: Ofer
authors.initials: O
authors.lastname: Girtler
authors.forename: Jaron
authors.initials: J
authors.lastname: Bocker
authors.forename: Sofa
authors.initials: S
authors.lastname: Bezdin
authors.forename: Ilya
authors.initials: I
authors.lastname: Barr
mesh_terms: D000328:Adult; D000375:Aging / Q000473:pathology / Q000502:physiology*; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D008297:Male; D008875:Middle Aged; D018587:Oocyte Donation; D009865:Oocytes; D011247:Pregnancy; D012189:Retrospective Studies; D013094:Spermatozoa / Q000166:cytology / Q000473:pathology / Q000502:physiology; D014019:Tissue Donors