Sciatica can grow to be an issue for a lot of pregnant ladies throughout the third trimester. It turns into an issue when the uterus applies pressure to the sciatic nerve because it expands through the pregnancy. There can also be problems as the load of the womb compresses the spines vertebrate towards the nerve endings. Another factor with pregnancy significantly, within the closing trimester is the strain on the sciatic nerve as a result of the elevated weight of the womb pulling the spinal column forward. All of these conditions mixed can lead to decrease back ache for many pregnant women.