Vanishing twin syndrome (VTS) is a miscarriage that causes a pregnancy involving twins to become a pregnancy involving one baby. It occurs when one of the embryos detected during an ultrasound stops developing. VTS can't be treated or prevented.
How common is it to be pregnant with twins and lose one?
This phenomenon occurs in about half of pregnancies with three or more gestational sacs, 36% twin pregnancies, and 20 to 30% of pregnancies achieved with assisted reproductive techniques.
What is the most common week to miscarry twins?
As with any pregnancy, most miscarriages in multiple pregnancies happen in the first 12 weeks.
Can one baby survive if the other one dies when carrying twins?
If this event happens in the first trimester of the pregnancy, the surviving twin will most likely develop without further consequences. However, if the fetal death occurs after mid gestation (17 weeks' gestation) there is an associated increased risk of preterm labor, IUGR, preeclampsia, and perinatal mortality [5,8].
Do you bleed if you miscarry one twin?
The only apparent complication associated with disappearance of a twin was first-trimester bleeding. Apparently a vanishing twin need not adversely affect the development of a coexisting singleton pregnancy.
Can a baby have 2 biological fathers?
Although this is quite rare it can happen and it's called superfetation. Two babies are conceived from separate acts in two different cycles. These babies can be from the same father or two different men. When heteropaternal superfecundation occurs, the babies are from different fathers.