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PREGNANCY WEEK BY WEEK

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PREGNANCY WEEK BY WEEK



WEEKS 1-2


Conception also called fertilization usually occurs about two weeks after the start of your last menstrual period also called LMP. Conception is when a man’s sperm fertilizes a woman’s egg. Conception happens in one of your fallopian tubes these are the tubes between your ovaries and your uterus womb.

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You might not know the exact day you get pregnant this is why health care providers use your LMP to find out how far along you are in pregnancy.

WEEKS 3-4



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The fertilized egg moves through the fallopian tubes towards your uterus and attaches to the lining of the uterus called implantation. Once it's implanted it begins to grow and the placenta forms the placenta grows in the uterus and supplies your baby with food and oxygen through the umbilical cord.

WEEK 5




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Your baby's neural tube forms the neural tube becomes your baby's brain spinal cord and backbone. Tiny buds start to appear that become your baby's arms and legs your baby's heart and lungs are developing and your baby's heart starts to beat.

WEEK 6




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Your baby's heart beats about 105 times a minute her nose, mouth, fingers, toes and ears are forming and begin to take shape.

WEEK 7



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Your baby's bones start to form but are still soft they harden as you get farther along in your pregnancy she now has eyelids but they stay shut. Your baby's genitals begin to form.

WEEK 8



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All of your baby's major organs and body systems are developing the placenta is working.

WEEK 9



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Tiny buds appear that become your baby's teeth your baby is close to ½ an inch long now.

WEEK 10



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Fingers and toes continue to develop and your baby's nails grow you might be able to hear your baby's heartbeat at your prenatal care checkup.

WEEK 11



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Your baby's bones begin to get hard her skin is still thin and see-through but gets less see-through over time her head makes up about half of her size.

WEEK 12


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Your baby's hands develop faster than her feet she moves around, but you might not be able to feel her move yet she's about two inches long and weighs about ½ an ounce.

WEEK 13



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This is the start of your second trimester your baby's growing fast her organs are fully formed and continue to develop on an ultrasound it might look like your baby's breathing and swallowing.

WEEK 14



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Your baby starts to move her eyes her nose and taste buds are developing her skin starts to thicken, and hair follicles under her skin begin to grow your baby opens and closes her hands and brings them to her mouth.

WEEK 15



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Your baby is very active she flips and rolls around inside you. You might begin to feel her move her bones are growing strong and you might be able to see them during an ultrasound your baby's kidneys make urine and her heart is pumping blood.

WEEK 16



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Your baby's eyelids upper lip and ears have developed she can hear you talk or sing to her as much as you like. Your baby is about five inches long and weighs about 5 ounces.

WEEK 17



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Your baby starts to add fat to her body fat gives your baby energy and helps her stay warm after she's born. Vernix appears on your baby's skin this is a waxy or greasy coating that's waterproof it protects your baby's skin in the womb.

WEEK 18


You might have your first ultrasound this week it's the first time you get to see your baby you may be able to tell if your baby's a boy or girl so be sure to tell your provider if you don’t want to know.



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Your baby goes to sleep and wakes up throughout the day loud noises and your movements can wake her. Her skin has lanugo this is soft fine hair that helps keep her warm in the womb.

WEEK 19



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Your baby's kicks and movements are getting stronger if you think you felt them before you really can feel her move now she learns how to suck which she needs for feeding after she's born. She might even suck her thumb in the womb.

WEEK 20



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Your baby's nails grow toward the ends of her fingers your baby is about ten inches long and weighs about One pound.

WEEK 21



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Your baby's fingers and toes are fully formed including her finger prints and toe prints your baby can swallow now and from time to time she might even hiccup you might feel these as regular jerky movements.

WEEK 22



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Your baby's eyelids are still shut, but her eyes are moving behind them her tear ducts start to develop, and her eyebrows may begin to appear your baby might move suddenly when she hears loud sounds.

WEEK 23



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Your baby may recognize sounds like your voice if you talk to your baby you may feel her move.

WEEK 24



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Your baby's muscles continue to grow she might start to have hair on her head her lungs are fully formed but she's not ready to breathe outside the womb yet she's about 12 inches long and might weigh a little more than one pound.

WEEK 25



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Your baby is growing fast as you start your third trimester her nervous system is developing fast. The nervous system is the brain spinal cord and nerves it helps your baby move, think and feel. Your baby adds more fat to her body that makes her skin look smooth and less wrinkly.

WEEK 26



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Your baby's body is making melanin a substance that gives her skin color and protects her skin from the sun after birth her lungs start to make surfactant. This substance helps your baby's lungs get ready to breathe.

WEEK 27



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Your baby is doing lots of kicking and stretching her lungs and nervous system continue to develop.

WEEK 28



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Your baby has eyelashes and she can open and close her eyes your baby is about 14 inches long and weighs about 2½ pounds.

WEEK 29



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Your baby starts to put on weight fast in the last 2½ months of pregnancy your baby gains about half of her birthweight. Make sure to eat healthy foods so your baby has the nutrients she needs to grow.

WEEK 30



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Your baby begins to lose the lanugo the soft fine hair that covers her body. She also might have a good amount of hair on her head.

WEEK 31



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Your baby's brain grows and develops quickly her brain can now help control her body heat.

WEEK 32




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As your baby adds fat to her body her skin is no longer see-through your baby is about 18 inches long and might weigh about five pounds.

WEEK 33



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Your baby's still gaining weight and growing as you get closer to your due date she gains about ½ pound per week.

WEEK 34



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The vernix, the waxy, greasy coating that protects your baby's skin in the womb starts to get thicker. Most babies move into a head down position to get ready for labor and birth it might happen this week or in the next few weeks.

WEEK 35



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Your baby's brain and lungs are still developing a baby's brain at 35 weeks weighs only two thirds of what it will weigh at 39 to 40 weeks if your pregnancy is healthy wait for labor to begin on its own. If you are planning to schedule a c-section or labor induction before 39 weeks it should only be for medical reasons.

WEEK 36



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It's starting to get crowded in the womb while your baby doesn't have room to do many flips or rolls you still feel her kick and stretch if you notice a change in how often your baby moves call your health care provider your baby weighs about six to seven pounds.

WEEK 37



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Important organs like your baby's brain, lungs and liver, are still developing your baby's still gaining weight if your pregnancy is healthy, it's best to stay pregnant for at least 39 weeks. Births scheduled before 39 weeks should be for medical reasons only.

WEEK 38



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Your baby's brain is still developing her liver and lungs are still growing. Your baby's size might make you feel uncomfortable. Hang in there if your pregnancy is healthy wait for labor to begin on its own.

WEEK 39



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You and your baby have made it to 39 weeks! This is great your baby is full term. She will let you know when she's ready to be born call your provider when you think you are in labor.

WEEK 40



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Congratulations on 40 weeks your baby is ready to be born. Your baby's had time to fully develop and is ready to meet you face to face call your provider when you think you're in labor your baby is about 18 to 20 inches long and weighs about six to nine pounds.

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