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Thymocytes undergo negative and positive selection during their development in the thymus. During this selection process, the majority of thymocytes are eliminated by apoptosis. In the first part of t...
Vertical distribution and abundance of three numerically dominant krill species (Nyctiphanes simplex, Nematoscelis difficilis, and Euphausia eximia) were surveyed in the Gulf of California to underst...
Oxygen toxicity is an inherent challenge to aerobic life, including spermatozoa, the cells responsible for propagation of the species. How this toxicity affects the spermatozoan in its interactions wi...
Erectile dysfunction (ED) is defined as the inability to achieve or maintain erections sufficient for satisfactory sexual intercourse (NIH Consensus Conference, 1993). It is estimated that the pre...
Twenty-five years ago the first human, Louise Brown, was conceived outside the body, and this event created a new milestone in the history of mankind and the concept of human in vitro fertilization (I...

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