000			01214 a2200373 4500
005			20250513125559.0
264		0	_c19980102
008			199801s 0 0 eng d
022			_a0197-3851
040			_aNLM _beng _cNLM
100	1		_aWald, N J
245	0	0	_aCombining ultrasound and biochemistry in first-trimester screening for Down's syndrome. _h[electronic resource]
260			_bPrenatal diagnosis _cSep 1997
300			_a821-9 p. _bdigital
500			_aPublication Type: Journal Article
650	0	4	_aChorionic Gonadotropin _xblood
650	0	4	_aDown Syndrome _xblood
650	0	4	_aFalse Positive Reactions
650	0	4	_aFemale
650	0	4	_aFetal Diseases _xblood
650	0	4	_aGenetic Testing _xmethods
650	0	4	_aHumans
650	0	4	_aMaternal Age
650	0	4	_aNeck _xdiagnostic imaging
650	0	4	_aPregnancy _xblood
650	0	4	_aPregnancy Trimester, First
650	0	4	_aPregnancy-Associated Plasma Protein-A _xanalysis
650	0	4	_aPrenatal Diagnosis _xmethods
650	0	4	_aRisk Factors
650	0	4	_aStatistics as Topic
650	0	4	_aUltrasonography, Prenatal _xmethods
700	1		_aHackshaw, A K
773	0		_tPrenatal diagnosis _gvol. 17 _gno. 9 _gp. 821-9
999			_c9293506 _d9293506