It is possible to consume mackerel in moderation during pregnancy. Mackerel is an excellent food, it is rich in a large amount of protein and a variety of vitamins, such as vitamin B12, vitamin D and a variety of minerals such as selenium, sulfur, etc., in line with the nutritional increase of pregnant women during pregnancy, so it is possible to eat in moderation. Mackerel is rich in vitamin B12. Pregnant women who are deficient in vitamin B12 may suffer from fatigue and weakness, headache and dizziness, etc. At the same time, vitamin B12 plays an extremely important role in the growth and development of the fetal nervous system. Pregnant women should eat more food rich in protein during pregnancy, such as eggs, pork lean meat, soy products, milk and so on. It is also necessary to properly supplement shrimp, fish, pork liver, oats, walnuts, peanuts and other foods, eat more fresh vegetables and fruits, to ensure that the intake of food nutritionally balanced, to avoid a single nutrition. During pregnancy, pay attention to more rest, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.