The apoptotic pathway in fertile and subfertile men: a case-control and prospective study to examine the impact of merocyanine 540 bodies on ejaculated spermatozoa.

Objective: To evaluate the presence of merocyanine 540 (M540) bodies and their impact on the measurement of apoptotic biomarkers in human spermatozoa.

Design: Case-control, prospective study.

Setting: Academic centers.

The effect of age on the expression of apoptosis biomarkers in human spermatozoa.

Objective: To evaluate the impact of age on the expression of apoptotic biomarkers in human spermatozoa.

Design: Cross sectional, prospective study.

Setting: Academic centers.