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.
Calories. 1  Preconception â Make sure you get enough calories to maintain a reasonable weight. 2  Pregnancy â Increase your diet by 300 calories per day starting in the second trimester. 3  Breastfeeding â Add 500 calories a day to your normal pre-pregnancy diet.