Maternal fat intake ( n = 25 ) might be associated with gestational weight gain as suggested by observational studies , although the direction of this association might depend on specific types of fat ( e.g. , saturated fat ) .
Macronutrient intake was not consistently associated with the prevalence of inadequate or excessive gestational weight gain .
CONCLUSIONS The current literature provides evidence that energy intake is associated with gestational weight gain , but the roles of individual macronutrients are inconsistent .
BACKGROUND  Abnormal gestational weight gain is associated with unfavorable pregnancy outcomes .
Several risk factors have been identified , but the effect of macronutrient intake during pregnancy on gestational weight gain has not been systematic ally evaluated in both high-income countries and low- and middle-income countries .
A randomised controlled trial of dietary energy restriction in the management of obese women with gestational diabetes
Summary : A r and omised controlled trial was design ed to determine the effect of moderate 30 % maternal dietary energy restriction on the requirement for maternal insulin therapy  and the incidence of macrosomia in gestational diabetes .  Although the control group restricted their intake to a level similar to that of the intervention group ( 6845 kiloJoules ( kJ ) versus 6579 kJ ) , the result ing cohort could not identify any adverse effect of energy restriction in pregnancy . Energy restriction did not alter the frequency of insulin therapy ( 17.5 % in the intervention group and 16.9 % in the control group ) . Mean birth weight  ( 3461 g in the intervention group and 3267 g in the control group ) was not affected . There was a trend in the intervention group towards later gestational age at commencement of insulin therapy ( 33 weeks versus 31 weeks ) and lower maximum daily insulin dose ( 23 units versus 60 units ) which did not reach statistical significance . Energy restriction did not cause an increase in ketonemia
Maternal fat intake ( n = 25 ) might be associated with gestational weight gain as suggested by observational studies , although the direction of this association might depend on specific types of fat ( e.g. , saturated fat ) .
Macronutrient intake was not consistently associated with the prevalence of inadequate or excessive gestational weight gain .
CONCLUSIONS The current literature provides evidence that energy intake is associated with gestational weight gain , but the roles of individual macronutrients are inconsistent .
BACKGROUND  Abnormal gestational weight gain is associated with unfavorable pregnancy outcomes .
Several risk factors have been identified , but the effect of macronutrient intake during pregnancy on gestational weight gain has not been systematic ally evaluated in both high-income countries and low- and middle-income countries .