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Doctor insights on: Cases Of Conjoined Twins

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Are there any conjoined twins with heart defects that survive?

Are there any conjoined twins with heart defects that survive?

Case reports only.: Most such cases die. The exceptions serve to illustrate this rule and are few and far between. ...Read more

Dr. Milton Alvis, jr
5 doctors shared insights

Conjoined Twins (Definition)

Conjoined twins are identical twins whose bodies are connected to each other, which is a rare phenomenon. Most conjoined twins are stillborn or die shortly after birth. Some surviving conjoined twins can be surgically separated. Conjoined twins develop when a single fertilized egg only partially splits into twin fetuses, or when an egg splits into twins but ...Read more


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Will every triplet or twin in identical births have the same developmental disability?

Will every triplet or twin in identical births have the same developmental disability?

Identical twins: With genetically "identical twins", the positions in the uterus can produce different birth deformities on occasion, with limb compression over time, neurologic deficits can occur. The genetic makeup of identical twins or triplets generally confers the same potential for other medical problems. ...Read more

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What is the incidence of twin births?

What is the incidence of twin births?

See below: Monozygotic twin births occur all over the world at a constant rate of 3.5 per 1000 births. Dizygotic twin births range from 6.7/1000 births in japan, to a high of 40/1000 births in nigeria. The two most important factors that influence dizygotic twinning are maternal age at conception, and the use of assisted reproductive technology. Due to the increasing tendency of women to delay pregnancy. ...Read more

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What are the risks of genetic amniocentesis in twins?

What are the risks of genetic amniocentesis in twins?

Low, but....: Amniocentesis is invasive, and the risk of ruptured membranes, and possible miscarriage, is at the rate of 1/110-1/200. There is the risk of misinformation by not sampling one, or both, of the sacs, as well. ...Read more

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Will every triplet or twin in identical births have the same learning disability?

Will every triplet or twin in identical births have the same learning disability?

No: Identical twins share some disorders to a high degree (e.g., adhd, bipolar disorder), but learning disabilities are not a specific disorder, rather a heterogenous grouping of brain dysfunctions that may affect learning. Multiples are at higher risk for ld's because of shortened gestation, increased incidence of neonatal problems, & decreased intrauterine nutrition. ...Read more

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What are the different fetal outcomes in cases of pre-eclampsia?

What are the different fetal outcomes in cases of pre-eclampsia?

Of course.: Range: death to completely healthy infants. The main determinant is acuity of care, prompt seeking of medical care, gestational age at diagnosis and luck. ...Read more

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Could an inutero twin death cause fetal lobulation in the surviving twin ?

Could an inutero twin death cause fetal lobulation in the surviving twin ?

Are you referring: to fetal lobulation of the kidneys? That is a normal anatomic variant, not related to an in utero twin. ...Read more

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Eggs splice, or the two fraternal twins suffer from vanishing twin syndrome and the twin literally absorbs the other twin, what does this mean?

Eggs splice, or the two fraternal twins suffer from vanishing twin syndrome and the twin literally absorbs the other twin, what does this mean?

Conjoined placenta: Unfortunately, the placenta often becomes shared between the twins and the one with the better access to the cotyledons of the placenta thrives and the other twin does not. An alternate scenario is when the two fraternal fetal twins are joined together but one does not develop as well as the other prior to placental development in the first trimester. ...Read more

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After healthy heart rates are identified in identical twins, what is the probability of a vanishing twin?

After healthy heart rates are identified in identical twins, what is the probability of a vanishing twin?

Fairly common: A conservative estimate of frequency is that vanishing twin syndrome occurs in 21-30% of multifetal pregnancies. More commonly identified now that first trimester ultrasound is widely used. There are no known preventive measures since the loss usually occurs because of cord implantation abnormalities. Thanks for trusting HealthTap! ...Read more

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Are conjoined twins attached at the head considered one person?

Are conjoined twins attached at the head considered one person?

Good one - no.: Although your question has metaphysical attributes, i would say that clearly cephalopagus conjoined twins are two genetically identical individuals fused at the head, but having separate brain anatomy and psyche. ...Read more

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Why are conjoined twins formed?

Why are conjoined twins formed?

Early accidental dev: Conjoined twins result from incomplete division of two embryonic discs at very early postconceptional age. They are an accident in early human development and exceedingly rare. ...Read more

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Heterochromia in one identical twin, not the other. Are they fraternal?

Heterochromia in one identical twin, not the other. Are they fraternal?

Not necessarily.: Identical vs. Fraternal twins are archaic terms that no longer apply to the modern perinatal terminology., however are still generally true and understandable to lay people. The color of eyes is not the determining factor in zygocity or chorionicity of twins - check prenatal records and placental pathology! ...Read more

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Are more twins born now because of ivf?

Are more twins born now because of ivf?

Yes but: There is more ivf going on now because it is more accepted and the rates of infertility are increasing (that's another post). But also to blame are some societal reasons like increasing maternal age at birth- older mothers are more prone to twinning. Also because of improved neonatal care, twins are more likely to survive and reach reproductive age and that increases odds of more twins. ...Read more

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How common are IVF pregnancies that result in twins?

How common are IVF pregnancies that result in twins?

Very: Ivf pregnancies, whereupon ovulation induction agents are used, markedly increases the occurance of multiple gestations. Embryos are screened before implantation to reduce this concern, but it still occurs with greater frequency than spontaneous pregnancies. ...Read more

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If chances of conception increase in 2 embryo transfer IVF Why doc recomend single embryo?what are risks of 2 embryo apart from twins?

If chances of conception increase in 2 embryo transfer IVF Why doc recomend  single  embryo?what are risks of 2 embryo apart from twins?

It's all about twins: Twins are a little bit trickier pregnancy. Twinning with 2 embryos is as high as 20-30%. In the US the ASRM allows 1 or 2 embryos in a 29 year old woman, but recommends only one. Personally I believe this is patient's choice and do NOT recommend 1 vs. 2, but that's me. Your info says you are 29 and in the UK? I do not know the UK standard of care but the science is the same. Best wishes! ...Read more

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Which type of surgeries would be performed to separate conjoined twins?

Which type of surgeries would be performed to separate conjoined twins?

Varies: Depends on the degree and site of joining. It can be as simple as a skin tube with a few vessels in it, to sharing internal organs and fusion of the crest of the skulls. The surgery to separate each in creases in complexity and sometimes would require the sacrifice of one for instance if there were only one brain or one heart. ...Read more

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If twins are monozygotic but dichorionic are they less completely identical genetically than monochorionic twins ?

If twins are monozygotic but dichorionic are they less completely identical genetically than monochorionic twins ?

The same.: Monozygotic dichorionic is another term for monochorionic diamniotic twins. They are expected to be genetically identical in both cases because they come from one original fertilized egg. ...Read more

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Does conventional ivf increase risk of genetic defect of baby conceived?

Does conventional ivf increase risk of genetic defect of baby conceived?

IVF & genetic defect: There are genetic causes of infertility that could be passed on to the baby. Otherwise I don't think there is enough data to make conclusions - my opinion. ...Read more

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What are the main differences between singleton pregnancies and twin pregnancies?

What are the main differences between singleton pregnancies and twin pregnancies?

Twice as many babies: Because the number of babies is doubled, the uterus grows larger faster; this will typically lead to a premature delivery at <37 weeks. There are also increased risks of pregnancy complications such as pre-eclampsia. Delivery route can also be affected if the first twin is not head down. If the first baby is head down, then a vaginal delivery of both twins can usually be performed. ...Read more

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