Sample size needed to assess risk of abortion after chorionic villus sampling.
Holzgreve
W
W
Reisch
A
A
Miny
P
P
Beller
F K
FK
D000022:Abortion, Spontaneous / Q000209:etiology*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000009:adverse effects*; D012306:Risk