If you have had gastric bypass surgery, you may notice your skin sagging under the arms, on the stomach and on the buttocks. Your sagging skin is completely normal and usually means you have lost a significant amount of weight, according to Dr.

Human chorionic gonadotropin, or hCG, is considered to be a pregnancy hormone. If you are not pregnant, you will have low levels of the hormone, but it rises significantly during pregnancy.

By the second trimester of your pregnancy, the worst of your morning sickness should be behind you, if you experienced it at all, according to the website SheKnows Baby & Pregnancy. In your second trimester, you should be gaining the most weight of your entire pregnancy.

During the third and final trimester of your pregnancy, your baby grows quickly. His eyes, bones, organs, brain and lungs are developing and his nutritional needs are increasing. In addition to his rapid growth, your body is preparing to give birth.

The body shows subtle signs of pregnancy shortly after conception. These early signs -- such as sore breasts, increased basal body temperature, fatigue and implantation bleeding -- are often associated with other conditions and my not be noticeable in some women.

Pregnancy and PMS (premenstrual syndrome) may have similar symptoms. Signs of pregnancy can occur before a missed period, according to Mayo Clinic. While waiting for a period a woman may easily mistake early pregnancy changes as PMS symptoms.

Most pregnant women don't track their hCG, or human chorionic gonadotropin, levels unless they have undergone fertility treatment or are experiencing pregnancy complications. Produced by the growing placenta during pregnancy, hCG is the hormone that home pregnancy tests detect in the urine.

Pregnancy may cause you some amount of anxiety, especially if this is your first child. Make sure you keep all of your appointments with your obstetrician.

It's not possible to tell whether you're pregnant immediately after ovulation. In fact, the embryo doesn't even begin to implant into the lining of the uterus until about 6 days after the egg is fertilized. Only after implantation does your body produce the hormones that cause early pregnancy symptoms.

The stomach flu, also known as viral gastroenteritis, causes nausea, vomiting, abdominal cramps and fever. The condition spreads through contact with an infected person or drinking contaminated water, states MayoClinic.com.

Tingling in the thigh, also known as meralgia paresthetica, is a condition characterized by a tingling sensation in the outer part of the thigh muscle, or quadricep. The condition results when the nerve responsible for supplying sensation to the surface of the leg gets compressed.

Pregnancy equals change, physically, emotionally and in the lifestyle of a woman. She is no longer thinking and acting on her own behalf, but is caring for and nourishing her child as well. Old habits may need to be broken or altered to benefit the baby, including medications taken, alcohol consumed and diet choices.