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The brain , the heart, the lungs and the spinal column.

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vocal cords, lips, eyelashes

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Q: What are four things that form or begin during the first trimester or pregnancy?
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When does the third trimester begin?

The third trimester begins at 29 weeks of pregnancy


Do you gain wait fast during the first trimester of pregnancy?

Gaining any or some weight during the first trimester depends on your weight to begin with. You can gain none, two pounds, or six. It really does just depend on you starting weight.My source was: caloriecount.about.com/forums/pregnancy.../gain-first-trimester(It's a great website for weight, how to lose it, and all questions.)


When do your breasts become sore during pregnancy?

Yes. Sore breasts in early pregnancy are common. As they begin to develop the mechanism for producing milk, there are a lot of changes and things get a bit crowded.


Which week of pregnancy is the neural tube is formed?

In the 3rd week of pregnancy called gastrulation, specialized cells on the dorsal side of the fetus begin to change shape and form the neural tube.


Which trimester of pregnancy does a baby begin to move in?

The second trimester is when movement can be felt by the mother, however movement begins in the first trimester but is small and light enough for the mother not to be able to feel it


When during fetal development so rhythmic breathing movement begin?

Late in the third trimester


How does a woman's body change during pregnancy?

The way in which a woman's body changes during pregnancy begins in the first trimester. Her breasts will grow and she will begin to gain weight. Throughout her pregnancy, her stomach will increase in size to accommodate the growing baby and she may get stretch marks. Near the end of her pregnancy, her ankles may swell due to water retention.


What trimester does lactation begin?

Usually at the third trimester.


Which happens during the second trimester (APEX)?

the lips begin to develop is one of them, hopefully its yours.


What are the stages of a baby in the womb?

There are three stages of pregnancy. The first trimester which is 0-3 months The second trimester 3-6 months The third trimester 6-9 months. The first trimester is the most crucial as this is the stage of pregnancy where any problems are at the highest risk. The second trimester is said to be the best as its the "blooming" stage as side affects from the first trimester go away and you begin to enjoy pregnancy more. The third trimester is said to be uncomfortable as your bump gets bigger you may find it hard to sleep and you get impatient as you cannot wait until you and your baby meet. you also feel like you need to Nest and get everything prepared for you and your baby. I hope this helps


Where does the possiblity of pregnancy begin?

During sexual intercourse usually.


Are breast supposed to leek during pregnancy?

Many mothers begin to leak Colostrum ( Sometimes called Pre-Milk. ) while they're pregnant, typically sometime in the third trimester. It is normal, although some expected mothers do not. So do not worry.