The vapor pressure of the water is lowered whenever a solute is added to a solvent because there are fewer solvent particles on the surface to evaporate. The diagram above shows that the vapor pressure of the solution is lower than that of the pure solvent, Therefore, the freezing point is also lowered.
Watch for signs of cervical dilation if you are near the end of your pregnancy. This indicates that you are in labor, and it's time to talk with your doctor or midwife. As the baby's head begins to press down on the opening of the uterus, the cervix will start to thin out and open.
Home / Labor and Birth / Mucus Plug: Bloody Show Throughout pregnancy, a mucus plug blocks the opening of the cervix to prevent bacteria from entering the uterus. Before labor, this mucus plug is expelled allowing the baby to pass through the cervix during labor and birth. Passing a mucus plug is a sign that your cervix is dilating and that your body is preparing for birth. Labor could be hours, days, or even weeks away as the cervix gradually opens.