From the moment you get the news that you are pregnant, you will probably be filled with a rush of emotions – and most likely a flood of questions too. While the first trimester of pregnancy is filled with a host of changes for you and for your baby, many will be invisible to the outside world. Read on to find out the Growth & Development of your baby during the first trimester.
First Trimester: It is a span of 12 weeks. In this trimester the fertilized egg change from small grouping cells to a fetus that starts to have baby features.
At the end of the first month
- Amniotic Sac forms around the fertilized egg.
- A round, flat organ called the placenta, which transfers nutrients from the mother to baby and transfers waste from the baby, develops by the end of the first month
- Primitive face takes form with large dark circles for eyes.
- Mouth, lower jaw, and throat start developing
- Blood cells start taking shape and circulation begins
- By the end of the first month, your baby is around 6-7 mm (¼ inch) long – about the size of a grain of rice.
Week 8 (2nd Month)
- Facial features continue to developing
- Each ear starts developing like a little fold of skin at the side of the head
- Tiny buds start forming which eventually grows into arms and legs
- Fingers, toes, and eyes also start forming
- The neural tube (brain, spinal cord, and other neural tissue of the central nervous system) is well-formed.
- The digestive tract and sensory organs start developing
- Bone starts to replace cartilage
- The embryo starts moving although you may not feel it.
- By the end of this month, your baby is a fetus about 2.54 cm (1 inch) long and weighs about 9.45g
Week 12 (3rd Month)
- Your baby is fully formed by the end of the third month
- Your baby has arms, hands, fingers, feet, and toes and can open and close its fists and mouth
- Fingernails and toenails start developing, and the external ears are formed
- Although the reproductive organs develop, the baby‘s gender is difficult to distinguish on ultrasound
- Circulatory and urinary systems start working and the liver produces bile
- At the end of the third month, your baby is about 7.6-10 cm (3-4 inches) long weighs about 28g
Since the most critical development has taken place, your chance of miscarriage drops considerably after three months.
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