Description
To count the duration of a pregnancy, we start from the first day of your last menstrual period up to the 37th-40th week. These 37-40 weeks further divide into three trimesters that last 13 weeks each.
The first trimester starts on the first week, which begins on the first day of your last menstrual period all through to the 13th week. During the first trimester, although your pregnancy may not show, your body is going through many internal changes as it seeks to accommodate the growing fetus.
