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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 ...
[7] [8] About 80% of miscarriages occur in the first 12 weeks of pregnancy (the first trimester). [1] The underlying cause in about half of cases involves chromosomal abnormalities. [5] [1] Diagnosis of a miscarriage may involve checking to see if the cervix is open or sealed, testing blood levels of human chorionic gonadotropin (hCG), and an ...
In the first trimester, a standard ultrasound examination typically includes: [12] Gestational sac size, location, and number; Identification of the embryo and/or yolk sac; Measurement of fetal length (known as the crown-rump length) Fetal number, including number of amnionic sacs and chorionic sacs for multiple gestations; Embryonic/fetal ...
A blighted ovum is a pregnancy in which the embryo is reabsorbed or never develops at all. [1] In a normal pregnancy, an embryo would be visible on an ultrasound by six weeks after the woman's last menstrual period. [2] Anembryonic gestation is one of the causes of miscarriage of a pregnancy and accounts for roughly half of first-trimester ...
Obstetric causes of first trimester bleeding include the following: Early pregnancy loss is a term often used interchangeably with spontaneous abortion and miscarriage and refers to pregnancy loss during the first trimester. [7] It is the most common cause of early pregnancy bleeding and is associated only with heavy (versus light) bleeding. [8]
The first, second, combined, and third trimester screens typically consist of an ultrasound (abdominal and/or transvaginal) and maternal blood/serum testing. The ultrasound is used to visually assess the growth, development, and activity of the fetus through imaging observations and measurements.
Pregnancies caused by diandric fertilization result in a miscarriage towards the first trimester. [medical citation needed] Another factor known as a partial mole pregnancy can cause triploidy. It is known to cause early termination, cancer, and even a second molar pregnancy. [medical citation needed]
[1] [2] On ultrasound and MRI, theca lutein cysts appear in multiples on ovaries that are enlarged. [3] Theca lutein cysts are associated with gestational trophoblastic disease (molar pregnancy), choriocarcinomas, and multiple gestations. [4] [5] In some cases, these cysts may also be associated with diabetes mellitus and alloimmunisation to Rh-D.
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