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Forum CopilulMeu • View topic - hormonul beta hCG

hormonul beta hCG

Metode contraceptive traditionale si moderne. Bebelusul: programare sau surpriza? Experiente, dezbateri pro si contra pentru diferite metode contraceptive.

Postby gheltu » Tue Sep 14, 2004 8:48 am

Stie cineva sa-mi dea amanunte despre hormonul beta hCG? In ce masura o valoare marita a hCG poate afecta sarcina? Care este valoare normala?

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Postby miti76 » Tue Sep 14, 2004 2:00 pm

Pentru ce anume recomanda medicul ginecolog o analiza a sangelui Beta-hcg si care sunt valorile normale ale unei astfel de analize? - Lucia.

Dr. Dan Tutunaru, specialist obstetrica - ginecologie la spitalul Elias din Bucuresti, raspunde:
Beta hCG reprezinta o analiza care deceleaza prezenta lantului beta al hormonului gonadotropinic corionic, care este secretat de catre tesutul trofoblastic (care va forma placenta) al embrionului. De obicei se masoara calitativ nivelele acestui hormon prin binecunoscutul test de sarcina, deci una dintre utilizarile sale este decelarea unei posibile sarcini (care poate fi atat intrauterina, deci normala, cat si extrauterina).

Tot in sarcina se dozeaza beta-hCG-ul in caz de suspiciune de mola hidatiforma, adica o sarcina cu embrion incomplet sau fara embrion deloc, situatie in care nivelele acestui hormon sunt extrem de ridicate. De asemenea, este folosit in depistarea prenatala a unor afectiuni fetale, facandu-se un scor de risc impreuna cu alfa FetoProteina si cu estriolul neconjugat, scor care da indicii asupra posibilitatii existentei sindromului Down (trei cromozomi 21), a sindromului Edwards (trei cromozomi 18) sau a defectelor de tub neural.

La femeile in afara gestatiei hCG-ul nu trebuie sa depaseasca 5 ui/l, dar la femeia insarcinata nivelele hCG depind de varsta embrionului, asa ca nu se poate spune care este nivelul normal decat raportat la varsta de amenoree (deci de la ultima data a ciclului). In sarcinile normale la fiecare 2 zile nivelele hormonului se dubleaza. Deci este mai important de urmarit nivelele hCG in dinamica, de exemplu daca in 2 zile se observa o crestere a hCG de doar 2/3 exista sanse mari ca sarcina sa fie una cu probleme. In sarcina extrauterina nivelele cresc foarte lent si uneori se observa o scadere a acestora! In trimestrul II de sarcina nivelele pot atinge 20-50 mii de ui/l.

Foarte rar exista si cancere care produc hCG (un exemplu este o forma particulara de cancer gastric, coriocarcinomul sau unele tipuri de cancer ovarian sau pulmonar)

Mai departe nu ma pot hazarda cu raspunsurile de ce va cere ginecologul dvs. aceasta analiza (poate suspicioneaza o sarcina ectopica).

sursa Eva-sanatate
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