[腎泌] 2題李茂盛醫師考古
（e）1. Approximately what percentage of abortions occur in
the first-trimester?
(a)30% (b)50% (c)70% (d)75% (e)80%
Spontaneous abortion (SAb), also known as miscarriage, refers to a pregnancy
that ends spontaneously before the fetus has reached a viable gestational age.
SAb is the most common complication of early pregnancy.
Eight to 20 percent of clinically recognized pregnancies under 20 weeks
of gestation will undergo SAb; 80 percent of these occur in the first 12 weeks
of gestation.The overall risk of SAb after 15 weeks is low (about 0.6 percent)
……from UpToDate…『Spontaneous abortion: Risk factors, etiology,
clinical manifestations, and diagnostic evaluation 』
（d）2. Approximately what percentage of spontaneous first-trimester
abortions show chromosomal abnormalities?
(a) 1%(b)10% (c)25% (d)50% (e)75 %
(p.25右上)……感謝恩慈找答案
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