MULTIPLE BIRTHS

[1] BOTTING B, IN PRESS ARCH DIS CH

[2] BUTLER NR, 1968, PERINATAL PROBLEMS, P122

[3] ELWOOD JM, 1980, EPIDEMIOLOGY ANENCEP, P217

[4] MACGILLIVRAY I, 1986, OBSTET GYNECOL, P248

[5] MYRIANTHOPOULOS NC, 1978, BIRTH DEFECTS ORIGIN, V14, pA6

[6] NEILSEN J, 1966, J MED GENET, V3, P114

[7] Nylander PPS., 1983, OBSTET EPIDEMIOLOGY, P143

[8] SCHNEIDER L, 1978, TWIN RES CLIN STUDIE, P143

[9] 1987, STUDY TRIPLET HIGHER

[1] BOTTING B, IN PRESS ARCH DIS CH

[2] BUTLER NR, 1968, PERINATAL PROBLEMS, P122

[3] ELWOOD JM, 1980, EPIDEMIOLOGY ANENCEP, P217

[4] MACGILLIVRAY I, 1986, OBSTET GYNECOL, P248

[5] MYRIANTHOPOULOS NC, 1978, BIRTH DEFECTS ORIGIN, V14, pA6

[6] NEILSEN J, 1966, J MED GENET, V3, P114

[7] Nylander PPS., 1983, OBSTET EPIDEMIOLOGY, P143

[8] SCHNEIDER L, 1978, TWIN RES CLIN STUDIE, P143

[9] 1987, STUDY TRIPLET HIGHER