Table 2. SNP-based maternal and fetal heritability for polybrominated diphenyl ethers (PBDEs) and 2,2′,4,4′,5,5′-hexabromobiphenyl (BB-153) in maternal serum.

	Maternal Genetics			Fetal Genetics
Compound	h2g	SE	P-Value	h2g	SE	P-Value
Persistent pesticides
p,p′-DDE	0	0.32	NS	0	0.36	NS
T-NONA	0	0.35	NS	0	0.37	NS
Polybrominated diphenyl ethers and biphenyls
BB-153	0.93	0.31	4.5 × 10−3	0.98	0.33	4.0 × 10−3
BDE-28	0.53	0.33	NS	0.82	0.34	1.3 × 10−2
BDE-47	0.73	0.31	1.6 × 10−2	0.99	0.31	1.6 × 10−3
BDE-99	0.39	0.33	NS	0.66	0.34	2.3 × 10−2
BDE-100	0.93	0.29	1.7 × 10−3	0.99	0.32	7.2 × 10−5
BDE-153	0.79	0.3	5.4 × 10−3	0.99	0.31	4.7 × 10−4
Sum PBDE	0.77	0.31	8.3 × 10−3	0.91	0.33	5.2 × 10−3
Polychlorinated biphenyls
PCB28	0	0.32	NS	0	0.36	NS
PCB99	0	0.35	NS	0.06	0.37	NS
PCB118	0.07	0.34	NS	0	0.38	NS
PCB153	0.36	0.32	NS	0.58	0.34	4.54 × 10−2
PCB170	0.39	0.33	NS	0.37	0.36	NS
PCB180	0.15	0.32	NS	0.1	0.35	NS
PCB187	0.42	0.33	NS	0.47	0.36	NS
PCB194	0	0.34	NS	0	0.37	NS
PCB199	0.38	0.32	NS	0.17	0.36	NS
PCB138/158	0.44	0.31	NS	0.57	0.34	4.58 × 10−2
PCB196/203	0.12	0.33	NS	0	0.36	NS
Sum PCB	0	0.36	NS	0.09	0.38	NS

h²_g, proportion of genetic variance on the total phenotypic variance; SE, standard error; NS, not significant.