Negative ions such as chloride, bicarbonate and sulfate are called anions. That's pronounced 'an' ions. The common electrolytes that are measured by doctors with blood testing include bicarbonate, chloride, potassium and sodium. The functions and normal range values for these electrolytes are described below.
Generally, signs of early pregnancy are more subtle. Hormones due to pregnancy may start to take effect from about 10 days from conception, and the symptoms tend to become more intensified as the level of hormones gradually increase.
Another early sign of pregnancy is the change in colour of your vulva and vagina (Chadwick's sign). It can happen as early as four weeks of pregnancy, often before you notice other signs (Cunningham et al 2005 cited by Hassall and Murray 2009:220) .owever, at this stage, your doctor will say that you're four weeks pregnant. She'll count your pregnancy from the first day of your last period, because there's no way of knowing for sure the exact day that you conceived.