000			01226 a2200385 4500
005			20250514011005.0
264		0	_c20011101
008			200111s 0 0 eng d
022			_a0197-3851
040			_aNLM _beng _cNLM
100	1		_aHackshaw, A K
245	0	0	_aInaccurate estimation of risk in second trimester serum screening for Down syndrome among women who have already had first trimester screening. _h[electronic resource]
260			_bPrenatal diagnosis _cSep 2001
300			_a741-6 p. _bdigital
500			_aPublication Type: Journal Article
650	0	4	_aAdult
650	0	4	_aAge Factors
650	0	4	_aBiomarkers _xblood
650	0	4	_aDown Syndrome _xblood
650	0	4	_aFemale
650	0	4	_aHumans
650	0	4	_aMass Screening _xmethods
650	0	4	_aMaternal Age
650	0	4	_aNeck _xdiagnostic imaging
650	0	4	_aPregnancy
650	0	4	_aPregnancy Trimester, First
650	0	4	_aPregnancy Trimester, Second
650	0	4	_aPregnancy, High-Risk
650	0	4	_aReproducibility of Results
650	0	4	_aRisk Assessment
650	0	4	_aRisk Factors
650	0	4	_aUltrasonography, Prenatal
700	1		_aWald, N J
773	0		_tPrenatal diagnosis _gvol. 21 _gno. 9 _gp. 741-6
999			_c11482040 _d11482040