There are several signs that labour might be starting, including: contractions or tightenings. a "show", when the plug of mucus from your cervix (entrance to your womb, or uterus) comes away. backache. an urge to go to the toilet, which is caused by your baby's head pressing on your bowel. Look out for these 10 signs of labor that tell you baby's on the way: Baby "drops" Cervix dilates. Cramps and increased back pain. Loose-feeling joints. Diarrhea. Weight gain stops. Fatigue and "nesting instinct" Vaginal discharge changes color and consistency.