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  2. Gestational trophoblastic disease - Wikipedia

    en.wikipedia.org/wiki/Gestational_trophoblastic...

    Persistent elevation of serum hCG levels after a non molar pregnancy (i.e., normal pregnancy [term pregnancy], or preterm pregnancy, or ectopic pregnancy [pregnancy taking place in the wrong place, usually in the fallopian tube], or abortion) always indicate persistent GTD (very frequently due to choriocarcinoma or placental site trophoblastic ...

  3. Human chorionic gonadotropin - Wikipedia

    en.wikipedia.org/wiki/Human_chorionic_gonadotropin

    Human chorionic gonadotropin is a glycoprotein composed of 237 amino acids with a molecular mass of 36.7 kDa, approximately 14.5kDa αhCG and 22.2kDa βhCG. [4]It is heterodimeric, with an α (alpha) subunit identical to that of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid-stimulating hormone (TSH), and a β (beta) subunit that is unique to hCG.

  4. Molar pregnancy - Wikipedia

    en.wikipedia.org/wiki/Molar_pregnancy

    A molar pregnancy, also known as a hydatidiform mole, is an abnormal form of pregnancy in which a non-viable fertilized egg implants in the uterus. It falls under the category of gestational trophoblastic diseases. [1] During a molar pregnancy, the uterus contains a growing mass characterized by swollen chorionic villi, resembling clusters of ...

  5. Gestational choriocarcinoma - Wikipedia

    en.wikipedia.org/wiki/Gestational_choriocarcinoma

    Gestational choriocarcinoma can happen during and after any type of pregnancy event, though risk of the disease is higher in and after complete or partial molar pregnancies. [3] Risk of disease may also be higher in those experiencing pregnancy at younger or older ages that average, such as below 15 years old or above 45 years old. [4]

  6. Trophoblastic neoplasm - Wikipedia

    en.wikipedia.org/wiki/Trophoblastic_neoplasm

    GTN often arises after molar pregnancies but can also occur after any gestation including miscarriages and term pregnancies. [6] Although risk factors may impact on the development of the tumor, most do not directly cause of disease. According to some studies, the risk of complete molar pregnancy is highest in women over age 35 and younger than 20.

  7. Placental site trophoblastic tumor - Wikipedia

    en.wikipedia.org/wiki/Placental_site_trophoblast...

    The tumor may secrete human placental lactogen, [2] and result in a false-positive pregnancy test. [3] A placental site trophoblastic tumor is a monophasic neoplasm of the implantation site intermediate trophoblast, and usually a benign lesion, which comprises less than 2% of all gestational trophoblastic proliferations. Preceding conditions ...

  8. Pregnancy test - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_test

    False negative readings can occur when testing is done too early. hCG levels rise rapidly in early pregnancy and the chances of false negative test results diminish with time (increasing gestational age). [24] Less sensitive urine tests and qualitative blood tests may not detect pregnancy until three or four days after implantation. [25]

  9. Pregnancy hormones - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_hormones

    The presence of hCG in a woman's body indicates that a fertilized egg has implanted in the uterus and the placenta has started to form. 10 days after fertilization, significant hCG can be detected from woman's blood sample. [6] The levels of hCG in the body increase rapidly in the first few weeks of pregnancy, doubling every 48–72 hours. [7]

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