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The First Trimester

By the time an embryo makes its way into the womb and attaches itself to the uterine lining, it has developed from a single egg into an embryo complete with all of its DNA information. The authors of What to Expect When You're Expecting describe the embryo as "tadpole-like" at this stage, smaller than even a grain of rice, but point out how quickly the tiny mass of cells is developing. By the end of the first month the baby has a head with a mouth opening, a basic heart and the beginning of a brain.

The Second Trimester

Throughout the first trimester (conception through three months), a baby grows at an astonishing rate, turning from a tiny group of cells into a fetus about the size of peach. The typical baby at thirteen weeks of pregnancy is between 2.5 and 3 inches in length, crown-to-rump . A fetus draws nutrition from its mother, so it's important that pregnant women eat healthy food at regular intervals to nourish their growing babies.

The Third Trimester

During the second trimester (four to six months), the baby continues to grow rapidly, reaching 9 inches crown-to-rump by month seven. The uterus at this point is roughly the size of a soccer ball. Because skin is developing at a faster rate than fat, the baby's skin will be loose, red and wrinkled. Babies also grow short, fuzzy hair on their bodies called lanugo, which will disappear during the last trimester. The baby's internal organs are maturing and he is able to swallow amniotic fluid and urinate. The baby now has a fully formed face, and some babies have even been photographed sucking their thumbs in the womb during the second trimester.

The Last Month

The baby continues to gain weight rapidly during the last trimester (seven to nine months). By the end of the seventh month, the average baby weighs around 3 pounds and measures about ten inches crown-to-rump . The lanugo begins to disappear at this point, while hair starts to grow on the baby's head. Around seven months the baby has eyebrows and eyelashes. The baby's brain develops rapidly during the last trimester, which is just one of the reasons premature labor is not preferable. The lungs also mature near the end of pregnancy, though a baby who is born early is still likely to survive because of advanced medical technology.

Over the last few weeks of pregnancy, a baby nears his birth weight and length. Her skull is not fully solid, which will help in the birthing process. As the baby moves through the birth canal, his head is slightly flexible and able to shift without harming the baby's brain. A few weeks after birth, his head will again be round.

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Related Questions

In what place does a baby grow?

womb


What else can you grow in your womb?

A Wombat? No, the only things that a human can grow in their womb is either a baby or a tumour.


What part of the system does the baby grow?

womb


How does the baby grow in the mother's womb?

basically the baby is first a embryo and then when it comes to the uterus is when the baby starts to grow its ears mouth nose legs feet hands arms head and all the other parts of the body that the baby will have and when it starts to grow the womb starts to get larger so that the baby can fit it the womb


How large can a baby grow in the womb?

A baby can grow nine months large before their born.


Where does a baby grow for 9 months?

In the mothers womb.


Why does it take so long for a women to have a baby?

because the baby needs time to produce and grow inside the womb.


How child grow in overy?

The baby grows in the womb, not in the ovary. Eggs come from the ovaries.


When does a baby grow arms?

Babies develop arms when they are 7 weeks old in the womb.


Can a baby survive and grow outside the womb?

Yes, a baby can survive and grow outside the womb with proper medical care and support. This is known as premature birth, and advancements in neonatal care have greatly improved the chances of survival for premature babies.


How many weeks is a baby to grow in the womb before delivery?

it takes 40 weeks for a baby to grow in a womb but if u deliver ur baby before 32 weeks then more likely u r going to have a premature baby i was pregnant and i carried my baby for 38 weeks i had a little boy he was 5lbs and 12 oz


What does a baby typically do in the womb during the various stages of pregnancy?

During the first trimester, a baby in the womb develops rapidly, forming organs and body structures. In the second trimester, the baby starts moving and kicking, and can hear sounds from outside the womb. By the third trimester, the baby continues to grow and develop, gaining weight and preparing for birth.