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Randomised trial to assess safety and fetal outcome of early and midtrimester amniocentesis

N. Okun, A. Summers, M. Desrochers, 1998, The Lancet.

Cytogenetic aspects of the Canadian early and mid‐trimester amniotic fluid trial (CEMAT)

Hongshun Wang, P. Eydoux, D. Kalousek, 1999, Prenatal diagnosis.

Randomised trial to assess safety and fetal outcome of early and midtrimester amniocentesis

N. Okun, A. Summers, M. Desrochers, 1998, The Lancet.