Generally speaking, there is no special food will cause fetal head size, fetal head size may be due to genetic factors, over-nutrition, disease factors, viral infections, etc.: 1, genetic factors: fetal head size is generally caused by certain congenital genetic syndromes, itself accompanied by macrosomia, accompanied by other organ malformations, is one of the manifestations of the genetic syndromes; 2, over-nutrition: over-nutrition intake Excessive nutrition: Excessive nutritional intake will make the fetus grow rapidly and present the situation of macrosomia, macrosomia is the corresponding increase in body, head and limbs, so it is generally enough to control nutritional intake; 3, disease factors: when the fetus has brain bulge, neurological anomalies, hydrocephalus and other diseases, it is possible to cause the fetus to have significantly larger head circumference, and it is necessary to do timely examination to exclude the disease; 4, viral infections: the fetus is infected by cytomegalovirus, or the absorption of the fetal cerebrospinal fluid, which can lead to the occurrence of dysfunction, and other reasons, and the result will be a result. Fetal cytomegalovirus infection or fetal cerebrospinal fluid absorption dysfunction and other reasons, will lead to fetal neurological infection caused by hydrocephalus. If the fetal head is too big in the process of labor and delivery, firstly, we should confirm the cause, if it is caused by disease, we should treat the cause in time. Secondly, it is necessary to choose the correct way of delivery to avoid the birth canal tearing. During the period of time, you should also keep a happy mood, do not add too much pressure to yourself, so as not to have a bad influence on the fetus.