Year
Twinning rate1
No. of twin pairs
No. of MZ twin pairs
No. of deaths from TTTS2
Prevalence per 10000 MZ twin pairs
MZ
DZ
Total
1995-1998
4.35
4.54
8.89
43989
21524.4
204
94.8
1999-2003
4.35
5.81
10.16
61008
26120.6
336.5
128.8
2004-2008
4.35
6.70
11.05
61876
24358.4
252.5
103.7
Total
4.35
5.73
10.08
166873
71994
793
110.1
Note:
1
Per 1000 births, 2Number of concordant for TTTS plus half number of discordant for TTTS
Table 5:
Twinning rate, number of monozygotic (MZ) twin pairs, number of deaths due to TTTS and prevalence of TTTS, 1995-2008.
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