Careful in First Trimester Pregnancywomen stages of pregnancy are divided into three trimesters. The first trimester is the first 12 weeks since last menstrual women. The first three months are generally to be exciting times, thrilling, once full of question marks and a great curiosity. Because at this time there is a development in itself women awesome. Many changes occur during the first trimester, so Mom needs to pay attention to everything that is needed. What should be done and what should not be done during this period. women need to be vigilant to avoid things that are not desirable.