Pregnancy is an important stage in a woman\’s life, which has an important impact on the development of the fetus and the health of the mother. In the early stages of pregnancy, that is, 1 to 3 months, special attention needs to be paid to supplementing appropriate nutrition to ensure the normal development of the fetus and the health of the mother. This article will introduce the key nutrients you need to supplement during the first to third months of pregnancy. What causes hair loss during pregnancy? Folic acid Folic acid is an important B vitamin that is essential for the development of the fetal nervous system. In early pregnancy, especially between 1 and 3 months, the fetus\’s spine and neural tube begin to develop, and folic acid intake is very important to prevent neural tube defects. It is recommended that pregnant women take 400 micrograms of folic acid every day, which can be obtained through food or oral folic acid tablets. Iron During pregnancy, the blood volume of pregnant women increases, so they need to supplement enough iron to meet the needs of the fetus and mother. Iron is an important component of red blood cells and is critical for oxygen transport. Pregnant women need to supplement about 27 milligrams of iron every day. They can consume iron-rich foods through food, such as red meat, poultry, fish, beans, nuts and green leafy vegetables. Calcium Calcium is an essential nutrient for fetal bone and tooth development. In the early stages of pregnancy, the fetus\’s bones begin to form, so pregnant women need to increase their calcium intake. It is recommended that pregnant women supplement 1,000 mg of calcium every day. They can consume calcium-rich foods through food, such as milk, soy products, fish, and green leafy vegetables. Proteins Proteins are an important building block of body tissue and are essential for the growth and development of both the fetus and mother. During pregnancy, a pregnant woman\’s protein needs increase. It is recommended that pregnant women consume about 60 grams of protein per day, which can be met by consuming protein-rich foods such as meat, fish, eggs, milk, beans, and nuts. Vitamin D Vitamin D plays an important role in the absorption and utilization of calcium and is important for fetal bone development and the normal function of the immune system. It is recommended that pregnant women consume 10 micrograms of vitamin D daily, which can be obtained through sun exposure and food intake. In rare cases, pregnant women may need supplemental vitamin D tablets. In addition to supplementing the above key nutrients, pregnant women should also pay attention to a balanced diet to avoid excessive or insufficient intake. In addition, pregnant women should follow the doctor\’s advice and have regular prenatal check-ups to ensure the health of the fetus and mother. To summarize, key nutrients that need to be supplemented during the first to third months of pregnancy include folic acid, iron, calcium, protein and vitamin D. A reasonable diet and doctor\’s guidance are the keys to ensuring the health of pregnant women and fetuses. I hope this article will be helpful to women who are preparing to become pregnant or in the early stages of pregnancy.