Table 1

Maternal blood, CVS, and TCC samples tested by QF-PCR with X22 and other STR markers. All the mixed (fetal + maternal) clumps have skewed fluorescent peak ratios between the STRs alleles

Sample	AMXY	X22	HPRT	D21S1411	D13S634	D18S386	Comments
H W (mat blood)	XX	223	284	282	474-488	352-376
CVS	XX	218-223	276-284	282	474-482	350-376
TCC clumps 1,2,5,6	XX	223	284	282	474-488	352-376	All maternal
TCC clumps 3,4	XX	218-223	276-284	282	474-482-488	350-352-376	Fetal + maternal
HTCC clump 7	XX	218-223	276-284	282	474-482	350-376	Fetal
P G (mat blood)	XX	228-233	284	290-298	478-482	372
CVS	XX	203-228	284-288	290	466-478	372-376
TCC clumps 1,3	XX	228-233	284	290-298	478-482	372	Maternal
TCC clump 2	XX	203-228-223	284-288	290-298	466-478	372-376	Fetal + maternal
TCC clump 4	XX	203-228	284-288	290	466-478	372-376	Fetal