If you're curious how big your developing baby is, what your baby looks like as it grows
inside you, and when you'll feel it move, then have a look at these images from inside
At this point of development the structures that eventually form the face and neck are becoming evident. The heart and blood vessels continue to develop. And the lungs, stomach, and liver start to develop. A home pregnancy test is now positive
The baby is now a little over half an inch in size. Eyelids and ears are forming, and the tip of the nose is visible. The arms and legs are well formed. The fingers and toes grow longer and more distinct.
Foetal Development at 12 Weeks
The foetus measures about 2 inches and starts to make its own movements. You may start to feel the top of your uterus above the pubic bone. Your doctor may hear the baby's heartbeat with special instruments. The sex organs of the baby should start to become clear.
Foetal Development at 16 Weeks
The foetus now measures about 4.3 to 4.6 inches and weighs about 3.5 ounces. The top of your uterus should be felt about 3 inches below your belly button. The baby's eyes can blink and the heart and blood vessels are fully formed. The baby's fingers and toes should have fingerprints.
Foetal Development at 20 Weeks
The baby weighs about 10 ounces and is a little over 6 inches long. Your uterus should be at the level of your belly button. The baby can suck a thumb, yawn, stretch, and make faces. Soon -- if you haven't already -- you'll feel your baby move, which is called "quickening."
Foetal Development at 24 Weeks
The foetus weighs about 1.4 pounds now. It responds to sounds by moving or increasing its pulse. You may notice jerking motions if it hiccups. With the inner ear fully developed, it may be able to sense being upside down in the womb.
Foetal Development at 28 Weeks
The foetus weighs about 2 pounds 6 ounces. It changes position frequently at this point in pregnancy. There's a good chance of survival if your baby is born prematurely now. Ask your doctor about preterm labour warning signs. Register for birthing classes. Birthing classes prepare you for many aspects of childbirth, including labour and delivery and parenting your newborn.
Foetal Development at 32 Weeks
Often moving, the foetus weighs almost 4 pounds. The baby's skin has fewer wrinkles as a layer of fat starts to form under the skin. It will gain up to half its birth weight between now and delivery. Ask your doctor how to do a fetal movement chart. Think about breastfeeding. Soon you may start leaking colostrum from your breasts, a yellowish fluid that precedes milk production. Visits to the doctor generally occur every two weeks at this stage of pregnancy.
Foetal Development at 36 Weeks
Babies differ in size, depending on many factors (such as gender, the number of babies being carried, and size of the parents), so your baby's overall rate of growth is as important as the actual size. On average, it's about 18.5 inches and weighs close to 6 pounds. The brain has been developing rapidly. Lungs are nearly fully developed. The head is usually positioned down into the pelvis by now. A pregnancy is considered "at term" once 37 weeks has been completed!
A mother's due date marks the end of her 40th week. A pregnancy begins with implantation and the delivery date can be calculated using the first day of the last period. Based on this, pregnancy can last between 38 and 42 weeks with a full-term delivery occurring around 40 weeks. Some post-term pregnancies -- those lasting more than 42 weeks -- are not truly post-term. A common "cause" is an incorrect due date. For safety reasons, most babies are delivered by 42 weeks, inducing labour if necessary.