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  2. Amniotic sac - Wikipedia

    en.wikipedia.org/wiki/Amniotic_sac

    The amniotic cavity is the closed sac between the embryo and the amnion, containing the amniotic fluid. The amniotic cavity is formed by the fusion of the parts of the amniotic fold, which first makes its appearance at the cephalic extremity and subsequently at the caudal end and sides of the embryo. As the amniotic fold rises and fuses over ...

  3. Amniocentesis - Wikipedia

    en.wikipedia.org/wiki/Amniocentesis

    The mechanism for pregnancy loss following amniocentesis is unknown but may be a consequence of bleeding, infection, or trauma to the fetus or the amniotic sac as a result of the procedure. [33] Studies from 2000 to 2006 estimated the procedure-related pregnancy loss at 0.6-0.86%.

  4. Amniotic fluid - Wikipedia

    en.wikipedia.org/wiki/Amniotic_fluid

    Amniotic fluid is removed from the mother by an amniocentesis procedure, where a long needle is inserted through the abdomen into the amniotic sac, using ultrasound guidance such that the fetus is not harmed. Amniocentesis is a low risk procedure, with risk of pregnancy loss between 1 in 1,500 – 1 in 700 procedures.

  5. Gestational sac - Wikipedia

    en.wikipedia.org/wiki/Gestational_sac

    The gestational sac is spherical in shape, and is usually located in the upper part (fundus) of the uterus.By approximately nine weeks of gestational age, due to folding of the trilaminar germ disc, the amniotic sac expands and occupy the majority of the volume of the gestational sac, eventually reducing the extraembryonic coelom (the gestational sac or the chorionic cavity) to a thin layer ...

  6. Fetal membranes - Wikipedia

    en.wikipedia.org/wiki/Fetal_membranes

    During early pregnancy, the amnionic epithelium is sparsely covered in microvilli, which increase in number throughout pregnancy. [4] The function of this microvillous surface is associated with a densely-packed glycocalix with anionic binding sites; these are thought to be involved with intra-amnionic lipid synthesis. [ 4 ]

  7. Fetal fibronectin - Wikipedia

    en.wikipedia.org/wiki/Fetal_fibronectin

    It is found at the interface of the chorion and the decidua (between the fetal sac and the uterine lining). Fetal fibronectin is found normally in vaginal fluid in early pregnancy prior to 22 weeks due to normal growth and development of tissues at the junction of the uterus and amniotic sac.

  8. Childbirth - Wikipedia

    en.wikipedia.org/wiki/Childbirth

    Usually the sac ruptures at the beginning of or during labour. It may cause a gush of fluid or leak in an intermittent or constant flow of small amounts from a woman's vagina. The fluid is clear or pale yellow. If the amniotic sac has not yet broken during labour the health care provider may break it in a technique called an amniotomy.

  9. Maternal physiological changes in pregnancy - Wikipedia

    en.wikipedia.org/wiki/Maternal_physiological...

    Illustration of fundal height at various points during pregnancy. Some degree of weight gain is expected during pregnancy. The enlarging uterus, growing fetus, placenta, amniotic fluid, normal increase in body fat, and increase in water retention all contribute weight gain during pregnancy. The amount of weight gain can vary from 5 pounds (2.3 ...

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