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.
From early pregnancy â at around seven weeks-a plug of mucus seals your cervix to help prevent infection â hence the name, mucus plug. However, just before labour starts â or during the early stages âit can come away. Itâs nothing to worry about, simply a sign that your cervix is starting to open and labour may follow quickly or within a few days.