It decreases in severity thereafter. Although it is most common in the morning, it may take place throughout the day. Even in early pregnancy, the breasts begin to enlarge. Swelling, soreness and increases sensitivity are other common breast symptoms. Frequent urination during the daytime and at night is common, especially in the first third of pregnancy.
Many women experience pelvic pressure and heaviness.
HCG is present in small amounts beginning one or two days after implantation of the embryo. Peak levels are not reached until eight to twelve weeks of gestation. There are many types of pregnancy tests. In general, blood tests are much more sensitive than urine tests. Home pregnancy test kits are available at most drug stores.