During the early pregnancy period, it is generally beneficial to consume folic acid, iron, calcium, and protein, all of which are conducive to the growth and development of the fetal heart and bud.

1. Folic acid: During the pre-pregnancy period and early pregnancy, folic acid can be taken orally under the guidance of a doctor, which can reduce neural tube defects in the fetus and also reduce the occurrence of anencephaly.

2. Iron: Supplementing the body with the required iron can promote the growth of the fetal heart and bud, and can also effectively prevent anemia. Iron-rich foods such as spinach, animal organs, and jujube can be consumed in moderation.

3. Calcium and protein: Supplementing the body with the required calcium and protein can promote the growth of the fetal heart and bud, and can also be consumed in daily life through foods such as meat, beans, and dairy products.