Pregnancy is the period from conception to birth. It usually lasts 40 weeks, beginning from the first day of the woman's last menstrual period. In many societies’ medical or legal definitions, human pregnancy is somewhat arbitrarily divided into three trimester periods. Healthcare professionals name three different dates as the start of pregnancy:
Since these are spread over a significant period of time, the duration of pregnancy necessarily depends on the date selected as the starting point chosen.
An average pregnant woman needs an extra 300 kilojoules in her diet per day for the first trimester, 600kJ during the second trimester and 900kJ in the last trimester.
Appetite may fluctuate throughout your pregnancy:
It is always better to get the necessary vitamins and minerals directly from food. However, a vitamin-mineral supplement can be a good way of ensuring that a pregnant woman will be able to meet her nutritional needs.
High amount of vitamins and minerals can be harmful to a developing baby. So, such vitamin and mineral supplements should never be taken without consulting the physician.