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Various types of chorionicity and amniosity (how the baby's sac looks) in monozygotic (identical) twins as a result of when the fertilized egg divides. Monochorionic twins are monozygotic (identical) twins that share the same placenta. If the placenta is shared by more than two twins (see multiple birth), these are monochorionic multiples.
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.
On March 14, Hannah, 29, gave birth to two sets of identical twins: girls, Evelyn and Adeline, and boys, David and Daniel. The babies were born via cesarean section at the UAB Women and Infants ...
Oh baby! One of Hilary Swank's twins is already ready to rumble.. The 48-year-old pregnant actor is in her third trimester with the twins, and she posted a new ultrasound photo on Instagram March ...
Alyssa Scott is sharing the first look at her future baby with Nick Cannon. The 29-year-old model took to Instagram to post a sweet image of the 3-D ultrasound of her future child's face, writing ...
Dizygotic (fraternal) twins can be caused by a hyperovulation gene in the mother. [8] Although the father's genes do not influence the woman's chances of having twins, he could influence his children's chances of having twins by passing on a copy of the hyperovulation gene to them. Monozygotic (identical) twins do not run in families.
Doctors put the odds of having identical quadruplets at about one in 15 million. There are roughly 72 documented cases of spontaneous identical quadruplets in medical history.
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 ...