Increasing paternal age and ejaculatory abstinence length negatively influence the intracytoplasmic sperm injection outcomes from egg-sharing donation cycles.

Background: The paternal role in embryogenesis is much more than providing a haploid genome. The spermatozoa have crucial roles related to embryogenesis' epigenetic regulation, fusion of gametes, and cleavage, which may influence intracytoplasmic sperm injection outcomes.

Objectives: To study whether paternal age, length of ejaculatory abstinence and semen parameters influence the outcomes of intracytoplasmic sperm injection in the oocyte recipients from egg-sharing donation cycles.

[Safe gametes acquisition through association of seminal processing techniques with HIV serodiscordant couples].

Purpose: the propose of this study was to analyze the clinical and laboratorial parameters of patients submitted to human assisted reproduction techniques with association of sperm processing techniques, in order to remove virus particles from semen samples of couples in which men was infected by human immunodeficiency virus (HIV).

Methods: assessed were 11 intracytoplasmatic sperm injection (ICSI) cycles from couples whose men were HIV seropositive (HIV Group), and 35 cycles in which semen donors' samples were used in ICSI procedures (Control Group). Semen samples from Control Group were submitted to routine semen analysis, sperm wash and cryopreservation.

Different intervals between vasectomy and sperm retrieval interfere in the reproductive capacity from vasectomized men.

Purpose: To evaluate the relationship between the postvasectomy period and sperm reproductive capacity after ICSI.

Methods: Seventy-seven ICSI cycles with percutaneous epididymal sperm aspiration (PESA) were reviewed. Patients were divided into 4 groups according to the interval after vasectomy: 0 - 5 years (G1); 6 - 8 years (G2); 9 - 14 years (G3), and > 15 years (G4).