Infant sex (n, %):

289 (53.3)

female

253 (46.7)

male

Parity (n, %):

313 (57.7)

1^st

229 (42.3)

>1^st

Mother education (n, %):

315 (58.1)

High school or less

227 (41.9)

university

Employment status (n, %):

369 (68.1)

House wife

172 (31.7)

Employed

27.74 ± 4.9, 17 - 43

Mothers’ ageing years (mean ± SD, range)