Distribution of birth weight discordance.

Birth weight discordance (%)	FD-FD1				FD2-Inf3			Inf-Inf			Total			Percentage
Birth weight discordance (%)	MM	FF	Total4	(%)	MM	FF	Total	MM	FF	Total	MM	FF	Total4	MM	FF	Total4
<15	41	29	80	(19)	3	1	4	2	2	4	46	32	88	19	16	18
15-25	40	35	78	(19)	1	4	5	1	4	5	42	43	88	18	22	18
25-35	54	42	105	(25)	3	3	6	5	4	9	62	49	120	26	25	25
35-45	39	35	81	(20)	3	3	6	3	4	7	45	42	94	19	21	19
45≥	33	18	69	(17)	5	8	13	5	6	11	43	32	93	18	16	19
Total	207	159	414	(100)	15	19	34	16	20	36	238	198	484	100	100	100

Note: ¹Fetal death, ²Number of heavier birth weight are 16 in FD and 18 in Inf., ³Infant death, ⁴Including unknown sex pairs

Table 3: Distribution of birth weight discordance for fetal and infant deaths from TTTS, 1995-2008.

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