Review of the development and current status of techniques for monitoring embryonic and fetal development in the first trimester of pregnancy.
This review is confined to the historical background and development of the 2 principal methods of chorionic villus sampling. The failure rate and incidence of fetal losses are presented for a variety of instruments. Early referral is essential to optimise the use of these techniques.
Ward
H
H
Department of Obstetrics and Gynaecology, University College and Middlesex School of Medicine, London, England.
D015193:Chorionic Villi Sampling / Q000379:methods*; D005260:Female; D005313:Fetal Death; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods*