Congenital hypothyroidism after assisted reproductive technology in Japan: comparison between multiples and singletons, 2005–2009

Table 1 Demographic and perinatal outcome data of all neonates with CH

ID	Maternal age	Method of ART	Blastocyst transfer	Gestational weeks	Plurality	Concordance/ Discordance in multiples	Sex	Early neonatal death	Other birth defects
1	24	FET	no	37	singleton		male	no
2	39	IVF	no	25	triplet	discordance	female	no
3	33	IVF	yes	41	singleton		male	unknown
4	39	ICSI	no	unknown	singleton		male	unknown
5	31	ICSI	yes	35	twin	discordance	male	no	hypospadias
6	31	FET	no	27	twin	concordance	male	no
7	31	FET	no	27	twin	concordance	male	no	patent ductus arteriosus
8	30	IVF	no	39	singleton		male	unknown
9	33	ICSI	yes	40	singleton		female	no
10	37	FET	yes	40	singleton		female	no
11	28	ICSI	no	39	singleton		female	no	cleft lip, congenital genu recurvatum
12	40	FET	yes	41	singleton		female	no
13	36	IVF	no	36	twin	discordance	male	no
14	29	ICSI	no	34	twin	discordance	female	no
15	39	IVF, ICSI	yes	36	singleton		female	no
16	38	ICSI	no	40	singleton		female	no
17	41	FET	yes	37	singleton		male	no
18	33	FET	yes	37	singleton		female	no

CH: congenital hypothyroidism, ART: assisted reproductive technology, FET: frozen embryo transfer, IVF: in-vitro fertilization, ICSI: intracytoplasmic sperm injection.

ISSN: 1687-9856