Growth & Development Of Your Baby During First Trimester | Dr. Monika Agrawal

/ Pregnancy Planning / By Monika Agrawal / 27 January 2022

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.

Her Care Clinic – Your Baby during 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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