Once you have conceived, it will take about a week for the fertilized egg to implant in the uterus. As implantation happens, it is now possible to experience one or more of the 10 pregnancy signs and begin to know you are pregnant. Around this time, hormone levels begin to change, and the body reacts to these new hormone levels.

Here are 10 pregnancy signs:

1. Light Spotting - if you have conceived, spotting can happen when implantation occurs before your menstrual period should begin. Pregnancy bleeding from implantation is pinkish or brownish and not heavy. A normal menstrual flow should begin light, become heavy, then taper off again before ending.

2. More Frequent Urination - urinating more often is one of the very early signs of pregnancy. Many women experience more frequent urination even before a missed period, usually from about 7-12 days after the temperature rise at ovulation. The changes in hormone levels produced by implantation of the embryo, especially the hormone "human chorionic gonadotropin" (hCG), cause more frequent urination.

3. Elevated Body Temperature - it is normal to have an increase in body temperature at ovulation. Your basal body temperature staying elevated after ovulation is completed and remaining elevated through when your period should begin can be one of the very early signs of pregnancy.

4. Missing a Menstrual Period - a missed period is one of the obvious 10 pregnancy signs. However, you can miss a period for other reasons including illness, stress, hormone imbalance and reactions to foods or medications. If your menstrual cycle normally occurs very regularly, missing a period can be a sign.

5. Fatigue - lack of energy as one of the very early signs of pregnancy may be hard to distinguish from other kinds of exhaustion. Feeling tired is related to the change in hormones in the body, which usually disappears as the body adjusts to the new hormone levels.

6. Cramping - the uterus can contract often and regularly. Moving around, exercise and orgasm all can trigger uterine cramping in early pregnancy.

7. Nausea - morning sickness is the name given to feeling nauseated when pregnant. Of the 10 pregnancy signs, only about half of pregnant women experience nasea, and feeling nauseated can happen any time of the day or night.

8. Tender Nipples and Breasts - one of the very early signs of pregnancy is a feeling of tenderness in the breasts and nipples. The good news is that these feelings of tenderness go away as the body becomes accustomed to the new hormone levels.

9. Darker Areolas - the area around the nipples becomes darker as early as one week after conception. The bumps on the areolas may look more prominent.

10. Constipation - you may notice a change in your bowels in early pregnancy. The intestines may relax and function less due to changing hormones and be one of the 10 pregnancy signs.

Once the very early signs of pregnancy are experienced, confirm pregnancy by using one of the better home pregnancy tests. There are major differences in the reliability of the home tests for pregnancy. A blood pregnancy test can be accurate as early as 8 to 10 days after conception, and a urine pregnancy test can be accurate as early as 10 to 14 days following conception. Pregnancy tests are not 100% accurate. If you feel you are pregnant but your pregnancy test result is negative, do the test again in a week or so and see your physician.

Remember to take good care of yourself and your body even before you become pregnant. Give up smoking and alcohol, eat healthy and begin exercising. Those first few weeks and your health are vitally important to help support healthy development of your new baby. Becoming pregnant and enjoying a successful pregnancy is a complex but wonderful experience. Besides knowing the 10 pregnancy signs, learn as much as you can about fertility, pregnancy and your health so your new baby will have the very best beginning to life that is possible.