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First Trimester: Week 1 - Week 4
As the fertilised egg grows, a water - tight sac forms around it, gradually filling with fluid. During this time, the placenta also develops. The placenta is a round flat organ that transfers nutrients from the mother to the baby, and transfers waster from the baby. In the first few weeks a primitive face will take form with large dark circle for eyes. The mouth, lower jaw and throat are developing. By the end of the first monty, the baby is about 1/4 inch long -
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First Trimester: Week 5 - Week 8
The baby's facial features continue to develop. Each ear begins as a little fold of skin at the side of the head. Tiny buds that eventually grow into arms and legs are forming. The neural tubes (brain, spinal cord and other neural tissues of the central system) is well formed now. After the 8th week, your baby is called a foetus instead of an embryo By the end of the second month, the baby is about 1 inch long -
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First Trimester: Week 9 - Week 12
The baby's arms, hands, fingers feet and toes are fully formed. At this stage the baby is starting to explore a bit by doing things like opening and closing fists and mouth. Fingernails and toenails are beginning to develop and the external ears are formed. By the end of the third month , the baby is fully formed. all the organs and limbs are present and will continue to develop in order to become functional. At the end of the third month, the baby is about 4 inches long. -
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Second Trimester: Week 13 - Week 16
The baby's heartbeat may now be audible through an instrument called a doppler. The fingers and toes are well - defined. Eyelids, eyebrows, eyelashes, nails and ahir are formed. Teeth and bones become denser, The nervous system is starting to function. The reproducing organs and genitalia are now fully developed and doctors can see on the ultrasound if you are having a boy or a girl. By the end of the fourth month, the baby is about 6 inches long. -
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Second Trimester: Week 17 - Week 20
At this stage the mother may begin to feel the baby moving around. The baby is developing muscles and exercing them. Hair begins to grow on baby's head. The baby's shoulders, back and temples are covered by soft fine hair called lanugo. This hair protects the baby and is usually shed at the end of the baby's first week of life. the baby's skin is covered with a whitish coating called vernix caseosa. -
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Second Trimester: Week 21 - Week 24
The baby's skin is reddish in colour, wrinkled and veins are visible through the baby's translucent skin. Baby's finger and toe prints are visible. Baby respond to sounds by moving or increasing the pulse.
if born prematurely, the baby may survive after the 23 week with intensive care. By the end of the sixth month, the baby is about 12 inches long. -
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Second Trimester: Week 25 - Week 28
The baby will continue to mature and develop reserves of body fat. At this point, the baby's hearing is fully developed. the baby changes position frequently and responds to stimuli, including sound, pain and light. At the end of the seventh month, the baby is about 14 inches long. -
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Third Trimester: Week 33 - Week 36
During this stage, the baby will continue to grow and mature. the lungs are close to being fully developed at this point. The baby's reflexes are coordinated so he or she can blink, Close the eyes, turn the head, grasp firmly and respond to sound light and touch The baby is about 17 to 19 inches long -
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Third Trimester: Week 37 - Week 40
In this final month, the mother could go into labor at any time, they may notice that the baby moves less due to the tight space. At this point the baby's position may have changed to prepare for birth. Ideally, the baby is head down in the uterus. The mother may feel uncomfortable in this final stretch of time as the bay drops down into the pelvis and prepares for birth. The baby is about 18 to 20 inches long.