What Happens to Your Body During Each Stage: Second Trimester

Pregnancy is a period characterized by constant physical and emotional shifts. It is typically divided into three trimesters—each bringing its own unique changes. In this article we will outline the medical procedures, essential tests and ways in which to maintain a healthy lifestyle for both you and your fetus during the second trimester (weeks 13 to 27).

Please note: Certain symptoms, such as heartburn or sleep difficulties, may carry over from the first trimester of your pregnancy. It is recommended to read the article about the previous trimester. Even in the second trimester, it is important to maintain a proper diet, to take recommended vitamins and dietary supplements, to be in the recommended range of weight gain and take vaccinations, as necessary.

During your pregnancy, you should attend regular prenatal check-ups with your OB-GYN. In addition to these visits, a medical team is available to address your questions, including prenatal care nurses, Tipat Halav, nurses, and midwives. We recommend checking with your HMO regarding the services available to you.

Physical Changes

During the second trimester of pregnancy, the uterus grows above the pelvis, the abdomen becomes more prominent, and the breasts continue to develop in preparation for breastfeeding. They become larger and fuller, and colostrum (the first milk) may appear. The nipples also darken, and small white bumps may appear around the areola (Montgomery glands), which are a natural part of the milk duct system.

It is important to know that some of the common symptoms from the first trimester may continue into the second trimester. While for most women nausea and extreme fatigue ease around week 13, many continue to experience heartburn and mood changes. Heartburn, caused by hormonal effects and increasing pressure from the growing uterus on the stomach, may sometimes become more noticeable as the fetus grows. If you feel that your symptoms are not improving or are affecting your daily functioning, try dietary solutions and consult your care team about safe medication options.

• Pregnant belly: The changes of pregnancy (intestinal bloating and weakening of the abdominal muscles) can make your belly appear more prominent. Starting around week 12, your uterus begins to rise above the pelvic bones, and your belly starts to show. By week 20, the uterus reaches the level of the belly button. With changes in body structure and weight gain, you may feel heaviness or back pain, especially in the lower back. This can be uncomfortable, but it is normal. If you experience ongoing pain, consult your doctor about ways to relieve it.
  It is important to know: appropriate physical activity and strengthening the pelvic floor can help reduce pain, heartburn, constipation, and fatigue.
• Frequent urination: Your body produces more urine during pregnancy, and your uterus presses on the bladder. As a result, you may need to use the bathroom often throughout the day.
  Pay attention: If you have pain, burning, or bleeding when urinating, inform your doctor, who may refer you for a urine test.
• Sleep problems: Usually, by the end of the first trimester, extreme fatigue improves. Sleep is important for your health, but this is also the stage when many women have trouble getting a continuous, good night’s sleep due to several factors: frequent trips to the bathroom, heartburn, discomfort when lying down, and feeling warmer than usual.
  What can help? Improve your sleeping position with pillows, keep a comfortable room temperature, and choose breathable, comfortable sleepwear and bedding. Try to go to bed at the same time each night, and avoid heavy meals and screens one to two hours before bedtime.
• Stretch marks: A dark line down the center of the abdomen (called linea nigra) is common and normal, as are stretch marks in different areas of your body (abdomen, thighs, breasts). You may sometimes feel dryness or itching around these areas, which can improve with moisturizer applied right after a shower. If you experience persistent itching, inform your doctor.
• Swelling: Swelling, especially in the legs, is common in the second and third trimesters. It is caused by fluid buildup and pressure from the uterus on blood vessels. To help reduce swelling, try to elevate your legs when resting, and if needed, consult your doctor about using compression stockings.

Checkups

• Weeks 14-16: Early anatomy ultrasound scan to detect structural abnormalities and evaluate fetal growth.
• Weeks 16-20: Second-trimester screening – Triple Marker Screen (AFP test). This blood test measures levels of Alpha-fetoprotein (AFP), HCG, and Estriol, and the results are integrated with first-trimester screening data.
• Weeks 19-24: Late anatomy ultrasound scan (Level II Ultrasound).
• Weeks 24-28: Complete Blood Count (CBC) and Glucose Challenge Test (GCT) to screen for anemia and gestational diabetes.

Emotional changes

As pregnancy nausea subsides and the experience becomes more concrete, fetal movement and ultrasound scans encourage the formation of an initial emotional bond, while also raising questions about future motherhood.

Many women begin to contemplate their maternal identity, the shift in family status, and the integration of career, relationship, and parenting. Occasionally, you may experience a decline in body image or a sense of vulnerability.

Recognizing the need for self-care, including rest, dividing household responsibilities, engaging in calming physical activity (such as prenatal yoga), and having open conversations with your partner, can enhance your sense of control and security.

For further information on emotional changes during pregnancy

Please note: If concerns regarding the health of your fetus or the upcoming delivery begin to dominate your day, interfere with your sleep, or affect your functioning, or if persistent negative thoughts cause significant distress for more than two weeks, seek immediate assistance.