Fish oil has only a small benefit on the risk of early birth.
But other research shows that taking fish oil does not improve symptoms.
If you feel that a recipe calls for too much fish oil - hold back on it.
Taking fish oil doesn't seem to lower blood sugar in people with type 2 diabetes.
However, fish oil doesn't seem to help prevent high blood pressure during pregnancy.
Eating less saturated fat and more fish oil is good for all of us.
"This is the first one with fish oil," she said.
Fish oil is often used to reduce pain associated with swelling.
Fish oil has also been tried for preventing heart disease or stroke.
Ironically, taking too much fish oil can actually increase the risk of stroke.