Pregnancy Nutrition: What Actually Matters in Each Trimester

Few areas of health attract as much conflicting advice as pregnancy nutrition. Much of it is cultural rather than clinical, and some of it is actively unhelpful, particularly restrictions that reduce protein or calorie intake at the time a woman needs both most.

Before conception and the first trimester

Folic acid is the one that cannot wait

Neural tube defects form in the first four weeks, often before a woman knows she is pregnant. Folic acid supplementation must therefore begin before conception, ideally three months prior, and continue through the first trimester.

• Standard dose: 400 micrograms daily
• Higher dose, usually 4-5 mg: previous affected pregnancy, diabetes, epilepsy medication, obesity, or malabsorption

India’s routine iron-folic acid programme covers this, but starting after a positive test has already missed part of the window.

Managing nausea

Nausea and vomiting affect most pregnancies in the first trimester. Practical steps:

• Small, frequent meals rather than three large ones
• Dry carbohydrate before getting out of bed
• Ginger has modest evidence
• Vitamin B6 is a recognised first-line treatment
• Keeping fluids up matters more than eating perfectly during these weeks

Persistent vomiting with weight loss, dizziness or inability to keep fluids down is hyperemesis gravidarum and needs medical treatment, not endurance.

Calories

Contrary to the eating for two idea, the first trimester needs essentially no extra energy, around 0-100 extra calories a day.

Second trimester

Appetite usually returns and this is when requirements genuinely rise.

• Energy: roughly 300-350 extra calories a day
• Protein: requirements rise appreciably; this is where many Indian vegetarian diets fall short. Dal, rajma, chana, paneer, curd, eggs, soy, nuts and seeds all contribute. Protein should not be cut.
• Iron: requirements rise sharply as blood volume expands. Routine supplementation is standard in India given the prevalence of deficiency. Take with vitamin C, away from tea, coffee, milk and calcium.
• Calcium: 1000 mg daily, from dairy, ragi, sesame, green leafy vegetables or supplements. Calcium supplementation also reduces the risk of pre-eclampsia in women with low intake.
• Vitamin D: supplementation is generally recommended; deficiency is widespread.
• Iodine: essential for fetal brain development. Iodised salt covers most requirements.