Most approaches to learning from incomplete data are based on the assumption that unobserved values are missing at random (mar). While the mar assumption, as such, is not testable, it can become testable in the context of other distributional assumptions, e.g. the naive Bayes assumption. In this paper we investigate a method for testing the mar assumption in the presence of other distributional...

Objectives: 1. To investigate the incidence, isotypes and location of antisperm antibodies (ASA) on the sperm surface in an infertile population. 2. To study the influence of isotypes, location of ASA on the sperm surface on fertilization, cleavage rates of embryos and pregnancy rate. Methods: A prospective analytical study was carried out on infertile couples who underwent Assisted Reproductiv...

STUDY QUESTION Does the health status of infants fathered by nonmosaic Klinefelter syndrome (KS) patients whose partners underwent ICSI with sperm obtained from testicular dissection reveal any genetic risk for the offspring?. SUMMARY ANSWER KS patients undergoing testicular sperm extraction (TESE) are capable of conceiving healthy children. WHAT IS KNOWN ALREADY Paternity has been successf...

Purpose To evaluate the effect of different numbers of basis images and the use of metal artifact reduction (MAR) on the production and reduction of artifacts in cone-beam computed tomography images. Materials and Methods An acrylic resin phantom with a metal alloy sample was scanned, with 450 or 720 basis images and with or without MAR. Standard deviation values for the test areas (around th...

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BACKGROUND Flat panel detector CT angiography with intravenous contrast agent injection (IV CTA) allows high-resolution imaging of cerebrovascular structures. Artifacts caused by metallic implants like platinum coils or clips lead to degradation of image quality and are a significant problem. OBJECTIVE To evaluate the influence of a prototype metal artifact reduction (MAR) algorithm on image ...

Sperm DNA fragmentation is being increasingly recognized as an important cause of infertility. We herein describe the Sperm Chromatin Dispersion (SCD) test, a novel assay for sperm DNA fragmentation in semen. The SCD test is based on the principle that sperm with fragmented DNA fail to produce the characteristic halo of dispersed DNA loops that is observed in sperm with non-fragmented DNA, foll...

The optical absorption and ligand binding properties of newly reconstituted sperm whale myoglobin were examined systematically at pH 8, 20 degrees C. The conventional absorbance and magnetic circular dichroism spectra of freshly reconstituted samples were identical to those of the native protein. In contrast, reconstituted azide or CO myoglobin initially exhibited less circular dichroism in the...

Conventional semen analysis solely is not completely adequate to predict pregnancy outcomes. Therefore, advanced sperm function tests have been developed and introduced to clinical practice. These tests use different methods and techniques to evaluate different stages of fertilization steps. In this review, we reported some commonly used sperm function tests: sperm penetration assay, sperm-zona...