Can we predict the chance of successful epididymal or testicular sperm aspiration following vasectomy?

Purpose of this retrospective study was to investigate if serum markers, men's age, interval since vasectomy, BMI, testicular size and smoking could predict the success of epididymal or testicular sperm aspiration (PESA/TESA) in vasectomized men. Forty-four consecutively performed PESA/TESA procedures were reviewed retrospectively. Motile sperm was retrieved from 77.

Human oocyte cryopreservation: evidence for practice.

Aim: The aim of this article is to review the evidence regarding human oocyte cryopreservation by slow freezing and vitrification and to provide evidence-based clinical and laboratory guidelines on the effectiveness and safety of these technologies.

Scope: These guidelines will address the following: Stage of oocyte maturity. Methods of cryopreservation/warming.