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MONTH-BY-MONTH BABY’S DEVELOPMENT - FIRST TRIMESTER (WEEKS 1-13)

MONTH 1

This is the beginning of your first trimester! You’ll likely not know you’re pregnant for a few more weeks. As the hormone HCG begins to increase around week 4 to 6, that’s when a pregnancy test will read ‘positive.’

By the end of this first month, you’ll have missed your menstrual period and the baby will be about 1/4 to 1/2 inch long! The baby will have all its organs present and on day 18 after conception it will have a heart beat and its arms and legs will begin to bud.

MONTH 2

It’s about this time that you’ll begin to experience the first signs of pregnancy, including extreme fatigue, frequent urination, morning sickness and other hormonal fluctuations.

By the end of this second month, your baby will have human facial features. They’re capable of motion, and their fetal heart tones may be heard. Arms, hands, fingers, legs, feet and toes are formed, and real bone begins replacing cartilage.

MONTH 3

By this point, your embryo is officially a fetus! If you’ve been experiencing morning sickness, it should be subsiding soon. By the end of this third month, the sex of the fetus can be determined and it’s less susceptible to outside forces. You may be able to see fetal kicking and making faces on a sonogram screen. Your fetus is also swallowing and practicing breathing movements!

ENGLISH

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