Normal sperm is thick and gelatinous (jelly-like). It is a natural feature of sperm that enables it to stick to the cervix of the female.
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Degree in Human Biology (Biochemistry) from the Pompeu Fabra University (UPF). Official Master's Degree in Clinical Analysis Laboratory from the UPF and Master’s Degree about the Theoretical Basis and Laboratory Procedures in Assisted Reproduction from the University of Valencia (UV).