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Nausea & Stomach Cramps During the First Week of Being Pregnant

by
author image Melissa McNamara
Melissa McNamara is a certified personal trainer who holds a Bachelor of Arts in journalism and communication studies from the University of Iowa. She writes for various health and fitness publications while working toward a Bachelor of Science in nursing.
Nausea & Stomach Cramps During the First Week of Being Pregnant
Nausea and cramps are common early pregnancy symptoms. Photo Credit Stockbyte/Stockbyte/Getty Images

Doctors determine your due date by the first day of your missed menstrual cycle, so, though fertilization --- the point at which you're technically pregnant --- won't typically occur until two weeks into your cycle, you're considered two weeks pregnant, for medical purposes, at the time fertilization occurs. Symptoms are rare one week into pregnancy, although cramping is one of the earliest pregnancy signs. If you haven't already, consult your doctor for a blood test, which can detect the pregnancy hormone a week after fertilization; discuss your symptoms during this visit.

Implantation

Once your egg is fertilized, it leaves the Fallopian tubes and burrows into the lining of your uterus. During this process, you may notice spotting of blood, with a flow too light to be a menstrual period. The blood is usually tinged pink or brown and occurs before your period is due. It's common to notice cramping in your lower abdominal region during implantation, which occurs six to 12 days after conception, the American Pregnancy Association explains.

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Morning Sickness

The nausea experience during pregnancy usually occurs about a month after conception, but it's possible to have nausea within two weeks after conception. It's unusual to have implantation at the same time as morning sickness, but not impossible. All pregnancy symptoms vary woman to woman, as does the time of onset for the symptoms. Morning sickness can occur any time during the day or night. Most nausea disappears shortly after the second trimester, but some women experience nausea during the entire pregnancy.

Other Reasons for Cramping

Most women are unaware of their pregnancy during the first week and it's common for women to miscarry before knowing about the pregnancy. Cramping is a common symptoms of a miscarriage. It's also possible that you're not pregnant and are experiencing pre-menstrual symptoms. Mild cramping of the lower abdomen and back are common shortly before your expected period. Intercourse can also cause spotting that resembles implantation bleeding and is accompanied by cramps. A vaginal infection or urinary tract infection can also cause cramping in the pelvic or lower abdominal region.

Other Reasons for Nausea

Food poisoning or viral gastroenteritis can cause nausea with stomach cramps. Nausea from food poisoning typically subsides within 24 hours; viral gastroenteritis, also known as the stomach flu, can last up to 10 days and causes symptoms of nausea with or without vomiting. Changes in your hormonal birth control can also cause nausea while your body adjusts to the new birth-control method.

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