Support during labor has been offered by a variety of different people
, including fathers, professional medical staff, trained labor coaches
and monitrices, untrained lay supporters and family and friends. A co
mparison of the various findings shows that support given by trained o
r lay untrained female supporters, who are not necessarily known to th
e laboring woman, yields the most extensive, methodologically sound, a
nd consistently positive effects on obstetric and psychosocial outcome
s. Although trained labor coaches have been shown to exert a positive
effect on outcome, the results of doula support are the most impressiv
e when both methodology and outcome effects are considered. Studies of
father support have yielded contradictory findings, although women do
appear to value their presence in most studies. Family and friends ha
ve not been shown to influence outcomes. Support from professional med
ical staff is rare, but when given, has, in some cases, had a positive
effect. These findings are important for the field, since the use of
lay supporters constitutes a low-cost preventive intervention. The inc
lusion of lay supportive women is also consistent with traditional pra
ctices in most countries in the world.