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2. Monochorionic twins - Wikipedia

   en.wikipedia.org/wiki/Monochorionic_twins

   The presence of a "T-sign" at the inter-twin membrane-placental junction is indicative of monochorionic-diamniotic twins (that is, the junction between the inter-twin membrane and the external rim forms a right angle), whereas dichorionic twins present with a "lambda (λ) sign" (that is, the chorion forms a wedge-shaped protrusion into the ...

3. Monoamniotic twins - Wikipedia

   en.wikipedia.org/wiki/Monoamniotic_twins

   Monoamniotic twins are identical or semi-identical twins that share the same amniotic sac within their mother's uterus. [1] Monoamniotic twins are always monochorionic and are usually termed Monoamniotic-Monochorionic ("MoMo" or "Mono Mono") twins. [1] [2] They share the placenta, but have two separate umbilical cords.

4. Obstetric ultrasonography - Wikipedia

   en.wikipedia.org/wiki/Obstetric_ultrasonography

   The heartbeat is usually seen on transvaginal ultrasound by the time the embryo measures 5 mm, but may not be visible until the embryo reaches 19 mm, around 7 weeks' gestational age. [5] [11] [12] Coincidentally, most miscarriages also happen by 7 weeks' gestation. The rate of miscarriage, especially threatened miscarriage, drops significantly ...

5. Twin-to-twin transfusion syndrome - Wikipedia

   en.wikipedia.org/wiki/Twin-to-twin_transfusion...

   By extrapolating the number of expected identical twins (about one-third) from annual multiple births, and the number of twins with monochorionic placentae (about two-thirds), and from these the number thought to develop TTTS (about 15%), there are at least 4,500 TTTS cases per year in the U.S. alone: 139,816 × 0.33 × 0.66 × 0.15 = 4,568 ...

6. Multiple birth - Wikipedia

   en.wikipedia.org/wiki/Multiple_birth

   A study in 2013 involving 106 participating centers in 25 countries came to the conclusion that, in a twin pregnancy of a gestational age between 32 weeks 0 days and 38 weeks 6 days, and the first twin is in cephalic presentation, planned Cesarean section does not significantly decrease or increase the risk of fetal or neonatal death or serious ...

7. This Mississippi mom thought she was having twins. It was ...

   www.aol.com/news/mississippi-mom-thought-she...

   Ashley is now 25 weeks along in her pregnancy and on bed rest at the University of Mississippi Medical Center in Jackson until she gives birth. Haylee and Shawn Ladner welcomed quintuplets at the ...