[Modified sperm stress test. Immune response and functionality of the human spermatozoid membrane].

Objective: Our purpose was to study, in semen samples of infertile patients, the relationship between the Modified Sperm Stress Test (MOST) and the presence of antisperm antibodies (ASA), macrophages concentration and the Hypoosmotic Swelling Test (HOST).

Methods: Semen samples from 42 men undergoing evaluation for infertility were examined according to WHO criteria. Twenty-five of them, whithout clumping non hyperviscosity, were selected.

[Macrophages in human semen].

Objectives: To investigate the presence of macrophages in human semen samples and the function they carry out in the seminal fluid. Their presence was studied in relation to spermatic morphology, percentage of spermatozoids with native DNA, and presence of antispermatic antibodies.

Methods And Results: The work was performed with semen samples from 31 unfertile males from 63 couples in which the "female factor" was ruled out as the cause of infertility.