Doctor insights on:
Vanishing Twin Lost
Will a vanishing twin (lost at 7 weeks) affect the results of first trimester Down's syndrome blood testing?
Unlikely: These tests rely on the active production of various markers in the blood and so a demised twin this early on will be unlikely to affect the test. These tests however, should be interpreted in the setting of a screening ultrasound to help better understand the risk. That being said, no test is ever 100% accurate, though they are useful. Consultation with a genetic counselor will help. ...Read more
Will a vanishing twin (lost at 7 weeks) affect first trimester downs syndrome testing with blood test and ultrasound?
Vanishing twin: No, it would not affect your test result. Ultrasound would show it for a while, but the developing twin will eventually grow big enough to hide it from view. ...Read more
Age 21 first pregnancy. Vanishing twin lost at 7 weeks. Nuchal translucency scan this week, so nervous! What are the chances that its high risk?
Don't worry: It sounds like you are getting good care. Try not to worry as it is not good for you nor your pregnancy. Just wait and see what the tests show. Try to enjoy your pregnancy, and do what you can to stay healthy. Drink plenty of water, eat a healthy diet containing lots of fresh fruits and vegetables, walk 45 minutes every day, and take Prenatal vitamins containing Folic acid. ...Read more
Vanishing twin syndrome lost at 7 weeks. What is the likelihood that remaining twin will have something wrong with it?
Pretty small: The chances of a genetic defect in the remaining twin is very small as long as it continues to develop. On most occasions the surviving twin got the majority of the placental perfusion and that is why it is still present and hopefully growing. ...Read more
Vanishing twin syndrome (lost at 5+ weeks), what is the likelihood of the remaining twin having something wrong with it?
Increased risk LBW: Compared to singletons, the surviving twin of VTS is at slightly greater risk of premature delivery, low birth weight and, for twin loss after 8 weeks gestation there is an increased risk for cerebral palsy. Loss of a twin at five weeks greatly reduces the risk for the surviving twin to have any adverse consequences. ...Read more
Aware: If this is what is happening I would say be aware, rather than be concerned. The outcomes are not guaranteed but they are often very good, this happens a lot. Best wishes. ...Read more
Demise of one fetus: Vanishing twin syndrome is the demise of one twin sometime during the pregnancy. One study suggested it occurred about 20-30% of twin pregnancies. Most commonly it occurs early in the pregnancy and generally the remaining fetus has a good outcome. Its' occurrence later in pregnancy can be associated with adverse maternal and fetal outcomes. ...Read more
2-4 weeks: 2-4 weeksGet a more detailed answer ›
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
None.: Vanishing twin syndrome is probably much more common that people think; it results in a singleton pregnancy and current evidence suggests it is rather the norm than the exception. No test can predict this, only serial prenatal sonograms can document it. No specific therapeutic intervention is warranted. ...Read more
Not enough info: To put this into context.Get a more detailed answer ›
At 12 weeks scan the ultrasound technician saw that the baby has penetrated the empty sac of the vanishing twin. How can this be?
I'm 39 & 6 weeks preg. W/ twins. How concerned should I be about vanishing twin syndrome? What should I expect at my visit in 2 weeks. I'm really scared
Worrying will not:
Help the matter any. Vanishing of one of the twin is being recognized more often due to the common use of ultrasound in early pregnancy. I understand your being concerned, but that will not affect the outcome. Please see this site for information on this topic.
http://emedicine. Medscape. Com/article/271818-overview. ...Read more
Lmp 3-31 on 4-20 + hpt. 4-24 hCG 303, on 4-30 hCG 173- 6hrs later hCG 197. Possible vanishing twin, or should I expect a m/c?
Likely miscarriage: When the HCG of pregnancy either plateaus or goes down, it's almost always an inevitable miscarriage. If it's appropriate, you may want to follow up with doctor for ultrasound or to follow HCG to zero (depending on your circumstances). Speak with your ob/gyn for guidance re your specific situation. Best of luck. ...Read more
At 12 weeks the ultrasound technician saw that my fetus has penetrated the empty sac of the vanishing twin. How could this be?
Good question: I am not sure what the ultrasound technician may have meant if he/she really stated the surviving fetus has penetrated the empty sac of the vanishing twin. If he/she is implying that the membranes of the vanishing twin are somehow wrapping around the surviving fetus, then this is a situation that you would want to have clarified by a Maternal Fetal Medicine specialist. Discuss a referral. ...Read more
Can your HCG level lower if you had vanishing twins syndrome? Had positive tests now negative with bleeding. I am almost 6 weeks.
Vanishing Twin is: More common than isolated cleft palate. Vt may occur in up to 30% of multiple gestations, but we are detecting this more frequently because of better tests. Cleft palate incidence differs among races, but occurs in about 0.5 births per 1000. CP is most common in american indians, then japanese, chinese, whites, and blacks. CP has a genetic basis whereas twin births generally do not. ...Read more
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
If 1 twin dies in utero (vanishing twin syndrome) is it likely or possible that the dead twins amniotic sac will continue to grow?
No.: The sac will not grow if the fetus does. ...Read more
I had slight bleeding but no pain or clots. Was told it was miscarriage could it be possible vanishing twin syndrome?
Probably not: However, you could ask your doctor to check your serum HCG levels if you wanted to rule this out. ...Read more
Can a vanishing twin actually be hidden? I am 35 have and have 10 living children, 4 miscarriages. 6 week sonogram clearly showed 1 baby. 8 week sonogram showed 1 baby with heartbeat and another sac partially hidden behind baby. It definitely wasn't eas
Yes: It sounds like a retained dead twin that was small and not so much hidden, but difficult to see. This does not happen often, but it definitely can happen... ...Read more
No: If they were identical twins, they would share the exact same genetic information. So no it should not make any difference. If they were fraternal twins, still should not be any effect. Hope this was helpful. Best of luck. Dr. R ...Read more
Miscarriage due to the bleeding. How long does it take for cervix to drop. Due to no drop in hCG could it be "vanishing twin"?
Unclear question: Please restate your question as it does not make sense in its current form. ...Read more