Limb defects and gestational age at chorionic villus sampling.
Olney
R S
RS
Khoury
M J
MJ
Botto
L D
LD
Mastroiacovo
P
P
D016022:Case-Control Studies; D015193:Chorionic Villi Sampling / Q000009:adverse effects*; D015331:Cohort Studies; D000013:Congenital Abnormalities / Q000453:epidemiology / Q000209:etiology; D005260:Female; D005865:Gestational Age; D006801:Humans; D007558:Italy / Q000453:epidemiology; D017880:Limb Deformities, Congenital; D011247:Pregnancy; D012307:Risk Factors; D014481:United States / Q000453:epidemiology