Molar pregnancy: In a molar pregnancy the fertilised egg attaches itself to the uterus but instead of developing into a foetus, it develops into a cluster of cells which is termed as complete molar pregnancy. In a partial molar pregnancy, an egg is fertilised by two sperms and the placenta turns to be a molar growth, the foetus has too many chromosomes and if developed, it is likely to have severe birth defects. A molar pregnancy also needs to be terminated if a spontaneous miscarriage doesn’t happen.