Which of the following is uncommon and a major cause for concern during pregnancy?

• A. Nausea and vomiting during weeks 8-14 of gestation.
• B. Heartburn & constipation after a big meal in the third trimester.
• C. Gaining no weight throughout the first trimester.
• D. Gaining no weight throughout the second trimester.

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the common physiological changes during pregnancy, such as nausea and vomiting typically occurring in the first trimester (weeks 8-14), and heartburn and constipation often experienced in the third trimester after large meals.
2. Step 2: Recognize that some weight gain is expected during pregnancy, especially starting from the second trimester, as the fetus grows and maternal tissues develop.
3. Step 3: Identify that gaining no weight throughout the second trimester is uncommon and concerning because it may indicate inadequate fetal growth or maternal nutritional deficiencies.
4. Step 4: Review the implications of insufficient weight gain during pregnancy, including risks for low birth weight, preterm birth, and developmental issues.
5. Step 5: Conclude that among the options, 'gaining no weight throughout the second trimester' is the major cause for concern and warrants further medical evaluation.