Intake of excess amount of choline during pregnancy can result in some side effects like low blood pressure, sweating, and stomach upsets. Furthermore, consumption of large amounts of choline can also pose risks such as birth defects to the fetus.Expectant mothers should consume 450 milligrams of choline every day according to the Food and Nutrition Board. But according to certain researches, it has been proposed that the adequate level of consumption can be as much as 930 milligrams per day.Choline is very important for the growth of the fetal brain and it also plays a role in preventing birth defects such as neural tube defects. Moreover, adequate intake of choline can benefit maternal liver health as well as prevent preeclampsia.The probably best source of choline during pregnancy is phosphatidylcholine which is found in foods like eggs and soya products. However, there are other derivatives such as choline bitartrate and citicoline which is equally effective.A choline supplement should be taken routinely during the second and third trimester of the pregnancy as advised. Despite this, it is advisable to seek medical advice regarding the correct time to take the supplement and the right dosage in pregnancy.Even though it is safe to take choline supplements while pregnant, you should first discuss it with a doctor before introducing such supplements. Furthermore, some people may suffer from various side effects such as stomach upsets, or low blood pressure.