Outcomes	Probable outcome with use of omega-3 fatty acids (95% CI)	Probable outcome without use of omega-3 fatty acids	NNT or NNH (95% CI)	Participants (studies)
Preterm birth (less than 37 weeks’ gestation)	119 per 1,000 (109 to 130)	134 per 1,000	68 (39 to 238)	10,304 (26)
Early preterm birth (less than 34 weeks’ gestation)	27 per 1,000 (20 to 35)	46 per 1,000	52 (39 to 95)	5,204 (9)
Gestation greater than 42 weeks	26 per 1,000 (18 to 37)	16 per 1,000	102 (47 to 568)	5,141 (6)
Low birth weight	140 per 1,000 (128 to 154)	156 per 1,000	63 (36 to 500)	8,449 (15)
Serious adverse events for neonate/infant	45 per 1,000 (37 to 62)	63 per 1,000	56 (38 to 1,000)	2,690 (2)