Cercetătorii coordonaţi de profesorul Karim Nayernia au conceput o tehnică ce permite obţinerea spermei umane în laborator, pe baza celulelor suşă embrionare purtătoare de cromozomi XY. Proiectul vine în ajutorul cuplurilor care nu pot avea copii, sau în cazul tinerilor care au făcut chimioterapie şi au devenit infertili. Procedura de fertilizare a ovulelor cu spermă obţinută în laborator nu este încă legală. Operaţiunea în sine este destul de complicată şi în ciuda rezultatelor, presupune o serie importantă de riscuri.
Profesorul Harry Moore, specialist în cadrul Universităţii din Sheffield, avertizează că „mai este încă multă muncă de facut pentru a elimina orice risc în fertilizarea cu spermă artificială şi folosirea acesteia la oameni”.
Departe de a fi de acord cu cei care consideră această descoperire drept „sfârşitul erei bărbaţilor” în procesul de reproducere, doctorul Allan Pacey, de la Societatea Britanică de Fertilizare, crede că „sperma artificială este un pas înainte în tratarea sterilităţii”.
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