It’s useful to know the difference between Braxton Hicks contractions and the actual factor. Swelling in the third trimester is normal, especially in your ankles and feet, since you’re retaining more water. But be careful for sudden or excessive swelling of your feet or ankles, facial swelling, puffiness round your eyes, and more than average swelling of your arms. These may be signs of preeclampsia, a critical being pregnant complication. If the date of your final menstrual period is uncertain, other strategies may be needed to determine the EDD. At the anatomy scan, you might have the ability to discover out the sex of your baby.