Your Baby's Development Now weighing about 3 pounds (1,400 grams) and measuring about 10.8 inches (27 cm) from crown to rump, your baby continues to gain weight and add layers of fat. This fat makes the baby look less wrinkly and will help provide warmth after birth. To prepare for breathing after birth, your baby will mimic breathing movements by repeatedly moving the diaphragm. Your baby can even get hiccups, which you may feel as rhythmic twitches in your uterus. Your Body Constipation is a common complaint of pregnancy. Pregnancy hormones slow the digestive process considerably. Exercising regularly and eating high-fiber foods, like vegetables and whole grains, are great ways to keep everything regular. PREGNANCY CALENDAR: A week-by-week guide Previous Next 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Trimester 1 Trimester 2 Trimester 3 Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.