BODY WEIGHT;
CASE-CONTROL STUDIES;
CHORIONIC GONADOTROPIN, BETA SUBUNIT, HUMAN;
DISEASES IN TWINS;
DOWN SYNDROME;
FEMALE;
HUMANS;
MASS SCREENING;
PREDICTIVE VALUE OF TESTS;
PREGNANCY;
PREGNANCY TRIMESTER, FIRST;
PREGNANCY, MULTIPLE;
REFERENCE VALUES;
REGRESSION ANALYSIS;
REPRODUCIBILITY OF RESULTS;
Free beta human chorionic gonadotropin in Down's syndrome screening: A multicentre study of its role compared with other biochemical markers
Spencer K, Coombes EJ, Mallard AS, Milford Ward A. Free beta human chorionic gonadotropin in Down's syndrome screening: a multicentre study of its role compared with other biochemical markers Ann Clin Biochem 1992; 29: 506–518.
Screening for fetal trisomies by maternal age and fetal nuchal translucency thickness at 10–14 weeks of gestation
Pandya PP. Snijders RJM, Johnson SP, de Lourdes Brizot M, Nicolaides KH. Screening for fetal trisomies by maternal age and fetal nuchal translucency thickness at 10–14 weeks of gestation. Br J Obstet Gynaecol 1995; 102: 957–962.
Maternal plasma levels of human chorionic gonadotrophin, oestradiol and progesterone in multifetal pregnancies before and after fetal reduction
Johnson MR, Abbas A, Nicolaides KH. Maternal plasma levels of human chorionic gonadotrophin, oestradiol and progesterone in multifetal pregnancies before and after fetal reduction. J Endocrinol 1994; 143: 309–312.