Pregnancy Loss and Vanishing TwinI recall hearing the phrase "vanishing twin" from my fertility doctor.
Although I lost a twin pregnancy, I never experience this particular syndrome (although I know a women who had some fluctuating HcG levels and they suspected that her pregnancy may have started with two but spontaneously reduced down to one.) Here is an article that explains more:
From the article:
Experts currently estimate that one-eighth of pregnancies begin as twins. But of course, the percentage of pregnancies that make it to term is smaller. Fertility specialist Dr. Carolyn Givens of
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See Also: Are You More Fertile After A Miscarriage (www.getpregnantover40.com)
Due to the increased use of fertility drugs and assisted fertility techniques like in vitro fertilization, there's been a spike in multiple pregnancies and an accompanying rise in early gestation ultrasounds, so what used to be an almost unheard of phenomenon is rapidly becoming a hot topic among mothers.
What Happens?When our twin disappeared, I found myself wondering if I'd done something wrong to cause the embryo to die. Did I sleep in the wrong side? Inhale someone's second-hand smoke? Lug my heavy one-year-old daughter around too much? The fact is that most of the time a twin vanishes during the first trimester for the same reason a single baby miscarries: There's a fatal genetic problem with the embryo and it couldn't continue developing into a full-fledged fetus. Dr. Givens explains, "This usually happens within the first eight weeks because that's when the organs form, and if there's a problem, this is when it will occur. If there's a chromosomal problem, some important gene doesn't turn on or do what it's supposed to do and the heart will stop developing."