High blood lipids during pregnancy are mainly caused by the following factors: first, high-fat diet and lack of physical activity, many pregnant women pay great attention to increasing nutrition during pregnancy, excessive fat intake, such as peanuts, pistachios, melon seeds, panko, etc., resulting in obesity and lack of physical activity, exercise, and ultimately affecting the metabolism of blood lipids, the formation of hyperlipidemia; second, genetic factors, some pregnant women with Secondly, genetic factors, some pregnant women have familial hyperlipidemia, which may be related to genetic defects, and this kind of patients are more likely to form hyperlipidemia if they do not control their diets; thirdly, dyslipidemia secondary to other diseases. The most common are hypothyroidism, Cushing’s syndrome, polycystic ovary syndrome, etc. These diseases can affect the synthesis and final metabolism of lipids in different ways and pathways, causing secondary hyperlipidemia, so you should check whether there is any of the above mentioned diseases in case of hyperlipidemia during pregnancy. In addition, some special obstetric diseases, such as fatty liver in pregnancy, may also be related to hyperlipidemia, and these diseases have an aggressive onset and should be treated in a timely manner.