Stages of Pregnancy

Stage 1

vStage 1 begins when the sperm fertilizes the egg. The 

fertilized egg attaches itself to the uterine lining. As the

 egg grows, the lungs, heart and spinal cord begin to 

develop. By the end of stage 1 of pregnancy, the baby's 

heart will begin to beat. The measurement of the baby

 during this stage is approximately 1/8-inch and weight is

 0.03 ounces.

Stage 2

vAt Stage 2 of pregnancy, the embryo begins to take 

the shape of a baby instead of a tadpole. By the end of

 stage 2, all internal organs are beginning to develop

, eyes and ears are beginning to form, and the arms

, finger buds, legs, and toes buds are developing. At

 this stage, the baby has its fingerprints. The

 measurement of the baby is about 1-inch long and 

weight is 0.1 ounce.

Stage 3

vStage 3 is when the embryo becomes a fetus. The

 face, fingers and toes are fully formed, which make 

the fetus look more human. The reproductive organs 

are forming, but sex of the baby cannot be 

determined. The measurement of the baby is about 

3.5-inches long and it weighs 1.7 ounces. Women will

 begin to notice the abdomen expanding to allow for 

growth of the baby. Fatigue and moodiness may 

diminish during stage 3.

Stage 4

vStage 4 is when the mom’s belly starts to be visible.

 The baby may begin to hear sounds, lungs continue to

 develop, and eyebrows and hair begin to start to 

appear. At this stage, the baby’s heartbeat can be

 heard. The measurement of the baby is about 5.5-

inches long and weight is 6 ounces.

Stage 5

vStage 5 is when the baby’s senses are active. The skin is 

sensitive and may respond to sounds and light. The 

baby’s kidneys begin to function and emit urine. At this

 stage, the immune system begins to help protect the

 baby from illness and infection. The measurement of the 

baby is about 7.5 inches and it weighs about 1 pound.

Stage 6

vStage 6, the eye retinas continue to develop, and the

 eyelids start to open and close. The baby also

 becomes aware of sounds. At this time, the mom may 

experience kicking in the belly due to the fact the baby

 is move mobile. The measurement of the baby is

 about 10 inches and weight is about 2 pounds.

Stage 7

vin stage 7, the baby can see and hear and becomes 

aware of mom and dad’s voices. The lungs are

 continuing to develop, bones and muscles are

 becoming stronger. Eyelashes start to grow, and the 

reproductive organs start to develop. The 

measurement of the baby is about 11 inches and 

weight is 3 pounds.

Stage 8

vIn stage 8, brain growth of the baby occurs. The baby’s

 body is almost fully formed. The lungs are still under 

development. The measurement of the baby is about 18

 inches and weight is 5 pounds.

Stage 9

vAt stage 9, the baby is ready to be born and turns 

its head down in preparation. The baby’s lungs are

 fully developed it continues to gain weight. The

 measurement of the baby is about 21 inches and

 weight is between 6 and 8 pounds.