-
week 3
In Week 3 we see the formation of the heart, the beginning development of the brain and spinal cord, and the beginning of the gastrointestinal tract. Teratogens introduced during this period may cause severe problems such as the absence of one or more limbs or a heart that is outside of the chest cavity at birth. -
week 6
Growth is rapid this week. Just four weeks after conception, the neural tube along your baby's back is closing and your baby's heart is pumping blood. -
week 9
During this week of pregnancy your baby is now swimming round in a little bag of fluid. The arms and legs have lengthened. They fingers and toes are forming, but are still joined by webs of skin. They can flex their elbows and wrists. They are growing eyelids as well as forming their anus. The embryo is protected by the amniotic sac that is filled with fluid. Inside the embryo swims and moves gracefully. The embryo is now about 1 inch long. -
week 12
Your baby now has a chin and a nose and a facial profile. Vocal chords are complete, and the baby can and does sometimes cry silently. The brain is fully formed, and the baby can also feel pain. The fetus may even suck his thumb. The eyelids now cover the eyes, and will remain shut until the seventh month to protect the delicate optical nerve fibers. The hair is on the head and the fingers and toes have developed soft nails. The kidneys are developed and begin to secrete urine. -
week 15
Fifteen weeks into your pregnancy, or 13 weeks after conception, your baby is growing rapidly. Your baby's skeleton is developing bones, which will become visible on ultrasound images in a few weeks. Your baby's scalp hair pattern also is forming. -
week 22
The baby is around 11 inches and almost 1 pound, your baby is starting to look like a miniature newborn. His lips, eyelids, and eyebrows are becoming more distinct, and he's even developing tiny tooth buds beneath his gums. His eyes have formed, but his irises still lack pigment. -
week 25
The baby now weighs nearly 660g and is about 35cm long from crown to heel. He's beginning to exchange his long, lean look for some baby fat. As he does, his wrinkled skin will begin to smooth out and he'll start to look more like a newborn. His senses are becoming more sophisticated, too. http://www.babycentre.co.uk/25-weeks-pregnant -
week 32
The baby weighs 3.75 pounds and is about 16.7 inches long, taking up a lot of space in your uterus. Your babys head should be facing down. The baby will stay in this position until birth,unless the baby decides to move. -
week 35
The baby is now weighs about 2.4kg and measures around 46cm from head to toe. His elbows, feet or head may protrude from your stomach when he stretches and squirms about. Soon, as the wall of your uterus (womb) and your belly stretch thinner and let in more light, your baby will begin to develop daily activity cycles. This week, your little one is sporting full-length fingernails and toenails and has a fully developed pair of kidneys. His liver can also process some waste products. -
week 40
You have now reached the time of delivery. The baby is getting ready for birth and is settling into the fetal position with its head down against the birth canal, its legs tucked up to its chest, and its knees against its nose. The bones of baby's head are soft and flexible to ease the process of delivery through the birth canal. The baby is about 20 inches and 6 to 9 pounds and is ready to come out into the world.
