Eyes, fingers and toes are visible. By the third month, internal organs such as liver, kidneys, intestines, and lungs begin limited functioning in the 3 inch fetus. The sex of the fetus can be distinguished. At this stage, the fetal development consists of growth in size and refinement of the features that already exist. Fetal movements can be felt by the end of the 4th month.
Subcutaneous fat develops.
By the end of the second trimester, the fetus has opened its eyes. The fetus continues to grow and develop the size and strength it will need to live on its own. It increases in weight form 4 lbs to about 7 lbs at birth. The woman should be tested to determine her immunity to rubella , a disease that may cause severe fetal defects if the mother contracts it while pregnant. Also an HIV test should be considered.