A growing baby needs these nutrients right from the start of the pregnancy:-

http://www.patient.co.uk/health/planning-to-become-pregnant

A growing baby needs these nutrients right from the start of the pregnancy:

• Iron is mainly in red meat, pulses, dried fruit, green vegetables and fortified cereals.
• Calcium is mainly in dairy products such as milk, cheese, and yoghurt. (Low-fat milk, cheeses and yoghurts usually contain just as much calcium as the full-fat varieties.)
• Folic acid is mainly in green vegetables, brown rice, and fortified cereals.