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week 1
This is week one of your pregnancy, but you're not officially pregnant yet. It might seem confusing, but your doctor will track your pregnancy and due date from the first day of your last period. Right now, your body is busy getting ready for when you do get pregnant. Your uterus is thickening so it can house and feed your fertilized egg once it implants. Now is the time to be patient and take good care of yourself -
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week 2
You still don't feel any different, but right now you're at the most fertile time of the month — you're ovulating! If a sperm makes its way to a waiting egg in your fallopian tube, you're going to conceive. A few days later, you could notice some light spotting. It might look like your period, but it's actually a sign that the fertilized egg has attached itself to the wall of your uterus. -
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week 38
the top of your baby's head is the one area still not completely finished;these bones will remain flexible to make the trip through the birth canal -
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week 3
Finally, you're pregnant! Sperm and egg have officially merged into one single cell, called a zygote. Inside that cell, a lot is going on. Chromosomes from you and your partner are combining to decide your baby's gender, hair, and eye color — even his or her budding personality! As the zygote speeds down the fallopian tubes toward the uterus, it will keep dividing. Two cells will become four, four will become eight, and so on. These cells will eventually create every organ in your baby's body. -
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week 4
Now that the embryo has attached to the wall of your uterus, the real work begins. Cells are dividing that will create all of your baby's organs. A fluid-filled cushion called the amniotic sac is forming. It will surround and protect your baby while he or she grows. Attached to it will be the yolk sac, which will feed baby in these early weeks. Your baby may be big enough to see on ultrasound now, but just barely. He or she is smaller than a grain of rice. -
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week 5
You still might not recognize your baby yet. At this stage, he or she looks like a tiny collection of tubes. But those tubes have important purposes! One tube is forming a brain and spinal cord. Another is developing into baby's heart. Tiny buds on either side of the body will grow into arms and legs. As your baby keeps growing, you might feel the first twinges of pregnancy symptoms, such as sore breasts, morning sickness, and the constant urge to urinate. -
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week 6
Ba-bum, ba-bum. It's way too quiet for you to hear, but your baby's tiny heart has started to beat. That heart sits inside a body that's now almost 1/2-inch long from the top of the head to the rump — about as wide as a pencil eraser. Baby still looks like a tadpole but that won't last for long. Human features are starting to emerge, including two eyes that come complete with lids. The lungs and digestive system are also starting to branch out, forming the organs that will help your baby breathe -
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week 7
Even though you're only in your second month, your baby's body is already forming every organ it will need — including the heart, kidneys, liver, lungs, and intestines. Buds are sprouting from baby's growing arms. Right now they look like paddles, but eventually they'll form hands and feet. Your baby is attached to you by an umbilical cord. Through this connection, you'll provide food, and filter away your baby's wastes until you deliver. -
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week 8
You might not look pregnant yet, but you probably feel it! If the morning sickness hasn't set in, you're at least feeling more tired than usual. Inside your uterus, your baby is developing at a rapid pace. In fact, he or she has officially graduated from embryo to fetus! If you peeked inside right now, you'd see the beginnings of a face on your bean-sized baby. You could make out two eyes, a nose, ears, and an upper lip. Your baby's body is also starting to straighten out. -
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week 9
Your baby weighs about 1/8 of an ounce — just bigger than a penny. The tadpole-like tail is almost gone, and in its place are two little legs. Your baby's head is still huge compared to the body, but it will get more proportional in the weeks to come. Inside, the reproductive organs are forming — although it's still too early to tell on an ultrasound whether you're having a boy or girl. If you look closely, though, you might see your baby move -
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week 10
Bye-bye tail! That early appendage is now completely gone. Also gone is the webbing between baby's fingers and toes. Your baby now has a real profile with well-defined eyes, mouth, and ears. Baby's eyes are wide open now, but soon the eyelids will close — at least temporarily. Inside baby's brain, the connections are forming that will one day help him or her ace a math test, or possibly play the cello. -
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week 11
Your baby has become very active, though you probably can't feel any flutters just yet. Baby still only measures just 2 inches long from the top of the head to the rump — about the size of a prune. Most of that is the head, which makes up about half of your baby's entire body! In a few weeks, baby's head and body will become more proportional. Also happening this week — your baby is growing fingernails and irises — the part of the eye that controls how much light enters. -
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week 12
You've reached the end of your first trimester — a major milestone! By the end of this week, your risk of having a miscarriage drops significantly, and you might want to start telling friends and family that you're expecting. By now you've put on 2 to 5 pounds, and your baby looks like a fully formed person. Inside, more organs are developing. Baby's kidneys are getting ready to produce urine. Your little one also has teeth, as well as fingers and toes — complete with nails. -
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week 13
Hopefully you're over any morning sickness you had. Now, you should be putting on weight. It won't be long before friends and co-workers start to notice your baby bump! Your baby is growing quickly now and is getting more proportional – now the head makes up only 1/3 of your baby's body. Helping your baby grow is the placenta, which is serving up a steady supply of nutrients and disposing of wastes. If you're having a girl, her ovaries are already filled with hundreds of thousands of eggs. -
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week 14
Your baby is right around 4 inches long from the top of the head to the rump and weighs about 4 1/2 ounces — roughly the size of a small peach. Like a peach, his or her body is covered with soft hairs. These are called lanugo, and they're like a little coat providing warmth in the womb. Don't worry — this fine covering of fur should be gone by your due date. Baby is also becoming an individual! He or she is developing fingerprints, including on the thumb, which might have already found its way -
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week 15
It's very clear what's going on right now inside your baby's body. Baby's skin is so thin you can see right through it! Look closely, and you'll be able to see a network of fine blood vessels forming. Baby's muscles are getting stronger, and he or she is testing them out by moving around, making fists, and trying out different facial expressions. At one of your next visits, your doctor should offer you a quad screening test to check for Down syndrome and other chromosome problems. -
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week 16
By now, your baby is nearly 5 inches long from the top of the head to the rump and weighs close to 4 ounces — about the size of a small apple. And you're probably enjoying a "pregnancy glow" right now. If your cheeks look flushed and healthy, it's because your blood volume has increased to supply your growing baby! There are also some downsides to this extra blood flow, including nosebleeds and bigger leg veins. Ask your doctor for tips to deal with these issues. -
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week 17
by week 17 your baby's digestive system is continuing to develop,and waste begins to build up the mother's bowels -
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week 18
all of the ear structures are in place of functioning.comfort sounds inside the womb may include the beat of mom's heart -
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week 19
a waxy substance begins to coat your baby's skin to protect it from her sursoundings. this coating will remain with her throughout the pregnancy -
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week 20
your baby's heartbeat is getting stronger, and will beat about twice as fast as your heart. you can hear it this week through a stethoscope -
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week 21
the baby is beginning to develop particular sleep-wake patterns that you may be able to detect -
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week 22
your baby's sense of touch is developing.she is reaching out to stroke her body, and push against your uterus in newfound feedom -
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week 23
your baby's looking more like she will at birth!translucent skin continues to develop,and fat deposits increase to help the skin look smoother -
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week 24
lung development takes a big leap forward this week,as your baby's body creates a wetting agent that helps keep the lungs from sticking together -
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week 25
this week your baby is developing a rich supply of nerves around the mouth.this will help the baby find the nipple when she's ready to nurse after birth -
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week 26
your baby is steadily gaining weight, now tipping the scales at almost two pounds and measuring about 13 inches in length -
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week 27
your baby's eyes ,which have remained closed to protect the retina,will open.your baby has completely developed auditory nerve -
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week 28
your baby's brain is beginning to develop the folds and fissures of the human brain,giving it the characteristic wrinkled-walnut appearance -
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week 29
your baby is producing hormones which trigger your body's production of colostrums,your "first breast milk" for baby's birth -
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week 30
you may notice tiny internal hiccups when your baby inadvertently swallows and inhales amniotic fluids -
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week 31
the irises in your baby's eyes will become pigmented. also, your babycan open and close its eyes while asleep or awake -
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week 32
your baby's physical appearance is cahnging while his or her wrinkles begin to disappear and the hair on head thickens -
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week 33
as your baby's brain cells continue to develop,her sense of touch,hearing and sight are becoming more refined -
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week 34
this week, many babies haved moved themselves into the correct"head - down position for delivery indicating babyis getting ready for birth -
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week 35
your baby will begin to rapidly gain weight as her body fat levels increase significantly. your baby is also starting to develop her immune system -
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week 36
your baby may be moving less frequently as it's becoming more crowded in the uterus -
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week 37
your baby now weighs about 6.5 pounds and measures about 21 inches in length.Also,your baby is able to make grasping moving with it's fingers. -
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week 38
your baby's weight is about 7 pounds,and the circumference,and the circumference of the her head and abdomen are roughly the same size -
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week 39
the top of your baby's head is the one are still not completely finished;these bones will remain flexible to make the trip through the birth canal -
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week 40
you may be ready to deliver this week.the average size of a baby born at 40 weeks is about seven pounds and 8 ounces