Let’s also discuss the first, second, and third trimesters of pregnancy. What happens to the developing fetus and mother during each stage? How is nutrition involved in each trimester?
The first trimester of pregnancy is marked by an invisible — yet amazing — transformation. And it happens quickly. Hormones trigger your body to begin nourishing the baby even before tests and a physical exam can confirm the pregnancy. Knowing what physical and emotional changes to expect during the first trimester can help you face the months ahead with confidence.
First trimester pregnancy: Your body
Consider common physical changes during the first trimester of pregnancy.
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Or your breasts might feel fuller and heavier. Wearing a more supportive bra or a sports bra might help.
You might find yourself urinating more often than usual, especially at night. Pressure from your enlarging uterus on your bladder might cause you to leak urine when sneezing, coughing or laughing. To help prevent urinary tract infections, urinate whenever you feel the urge. If you're losing sleep due to middle-of-the-night bathroom trips, drink less in the evening — especially fluids containing caffeine, which can make you urinate more. If you're worried about leaking urine, panty liners can offer a sense of security.
Fatigue also ranks high among first trimester symptoms. During early pregnancy, levels of the hormone progesterone soar — which can put you to sleep. At the same time, lower blood sugar levels, lower blood pressure and increased blood production might team up to sap your energy. To combat fatigue, rest as much as you can. Make sure you're getting enough iron and protein. Include physical activity, such as a brisk walk, in your daily routine.
Food aversions or cravings
When you're pregnant, you might find yourself turning up your nose at certain foods, such as coffee or fried foods. Food cravings are common, too. Like most other symptoms of pregnancy, these food preferences can be chalked up to hormonal changes — especially in the first trimester, when hormonal changes are the most dramatic.
Pregnancy causes your blood vessels to dilate and your blood pressure to drop, which might leave you lightheaded or dizzy. Stress, fatigue and hunger also may play a role. To prevent mild, occasional dizziness, avoid prolonged standing. Rise slowly after lying or sitting down. If you start to feel dizzy while you're driving, pull over. If you're standing when dizziness hits, sit or lie down.
Seek prompt care if the dizziness is severe and occurs with abdominal pain or vaginal bleeding. This could indicate an ectopic pregnancy — a condition in which the fertilized egg implants itself outside the uterus. To prevent life-threatening complications, the ectopic tissue must be removed.
Heartburn and constipation
During first trimester pregnancy, the movements that push swallowed food from your esophagus into your stomach are slower. Your stomach also takes longer to empty. This slowdown gives nutrients more time to be absorbed into your bloodstream and reach your baby. Unfortunately, it can also lead to heartburn and constipation. To prevent heartburn, eat small, frequent meals and avoid fried foods, carbonated drinks, citrus fruits or juices, and spicy foods. To prevent or relieve constipation, include plenty of fiber in your diet and drink lots of fluids. Regular physical activity also helps.
First trimester pregnancy: Your emotions
Pregnancy might leave you feeling delighted, anxious, exhilarated and exhausted — sometimes all at once. Even if you're thrilled about being pregnant, a new baby...