Week 13 of Pregnancy

Baby Size Comparison in Week 13

In week 13 of pregnancy your baby measures about 7.5 cm long and weighs about 23 grams: roughly the size of Lemon. Remember these are approximate averages from standard growth charts; every baby grows at their own pace, and your doctor follows your baby's personal growth curve across visits, not a single number. If an ultrasound measures a little bigger or smaller than average, that is usually normal as long as growth continues at a steady rate.

Baby Development in Week 13

The unique fingerprints form that will accompany your child for life, and the fetus can put its thumb in its mouth and suck it. The vocal cords are complete, though they will not be used before birth, and the intestines have settled inside the belly and begun their training movements.

The kidneys work and produce urine regularly, and the liver stores iron and glycogen. The bones gradually harden, starting with the skull and limbs, and the skin is still transparent and thin with blood vessels visible through it. The fetus moves actively: it kicks, turns, and sucks its thumb, but you will not feel anything yet because of its small size. The beginning of the second trimester, usually the most comfortable and enjoyable stage of pregnancy.

The unique fingerprints form that will accompany your child for life, and the vocal cords are complete. The intestines settle inside the belly and begin their training movements, and the kidneys produce urine regularly. The liver stores iron and glycogen, and the bones gradually harden. The skin is still transparent with blood vessels visible through it. The fetus moves actively: it kicks, turns, and sucks its thumb, but you will not feel anything because of its small size. The beginning of the second trimester, which most doctors and mothers consider the most beautiful and comfortable stage of pregnancy.

Your Body Changes in Week 13

Nausea actually begins disappearing in the vast majority, and energy and the desire for normal life return. Appetite improves and you may crave strange foods (pregnancy cravings); respond in moderation without excess.

The uterus is the size of a small cantaloupe and still low. You may notice increased vaginal discharge and nasal congestion (pregnancy rhinitis) from increased blood flow to the mucous membranes. Mild back pain may begin as the center of gravity gradually shifts. Libido returns in many after weeks of aversion. Emotionally: the second trimester is called the honeymoon of pregnancy; enjoy it.

Libido improves in many after weeks of aversion, and intimacy is safe in a healthy pregnancy. Sweating may increase from higher body temperature; wear cotton clothes. See your dentist; gum health affects pregnancy. And enjoy this golden period of pregnancy.

Practical Tips for Week 13

• Gradually restore your activity: walking, swimming, prenatal yoga; all are safe and beneficial.
• See your dentist; gum inflammation is common in pregnancy and needs care.
• Eat balanced meals without eating for two; you need only 300 extra calories.
• Sleep on your left side whenever possible to improve blood flow to the placenta and baby.

Frequently Asked Questions About Week 13