title: What is the true fetal loss rate in pregnancies affected by trisomy 21 and how does this influence whether first trimester detection rates are superior to those in the second trimester?
authors.forename: K
authors.initials: K
authors.lastname: Spencer
mesh_terms: D000022:Abortion, Spontaneous; D000328:Adult; D004314:Down Syndrome / Q000150:complications* / Q000175:diagnosis*; D005260:Female; D005313:Fetal Death / Q000209:etiology*; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second