If you have symptoms like these, you need to see a doctor right away, especially if they are sudden and severe. In most cases, pulmonary embolism is caused by a blood clot in the leg that breaks loose and travels to the lungs. A blood clot in a vein close to the skin is not likely to cause problems. But having blood clots in deep veins (deep vein thrombosis) can lead to pulmonary embolism.
â A daily increase of 340 calories is recommended during the second trimester of pregnancy, and an increase of 452 calories is recommended during the third trimester of pregnancy. â The nutritional requirements of women who are pregnant or lactating involves more than increased caloric intake.
1 Energy needs do not change in the first six months of pregnancy. Only in the last three months do a womanâs energy needs increase by around 200 calories per day.  Moderate-intensity physical activity will not harm the mother or baby. At least 30 minutes per day of moderate intensity activity is recommended.