Table 1. Duration of the maternal treatments during gestation and newborn outcome.

Duration of maternaltreatments (days)				Newborn
	N	LL	Mel	GA at birth(days)	Weight(g)	SexM/F
LD	6	−	−	157.4±2.0	217.5±9.2	3/3
LL	5	51.8±4.7	−	154.2±2.2	213.0±14.5	3/2
LL+Mel	5	51.4±2.2	46.0±1.8	156.2±1.2	232.0±12.1	2/3

Data are mean±SE. Maternal treatments: LD: photoperiod 14∶10 during pregnancy and post delivery, lights on at 0700 hours; LL: continuous light during pregnancy and post delivery, LL+ M: continuous light during pregnancy+daily dose of melatonin at 1800 hours until delivery followed by continuous light post delivery. M = male; F = female GA = Gestational age.