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There is no updates on the baby in weeks 1 and 2. -
Conception.
The zygote turns into blastocyst and travels down the fallopian tube.
Rapid cell division begins and the blastocyst implants in uterus lining during week 4 and becomes an embryo. -
Nurueal tube closes; brain and spinal cord will form. -heart, organs, and bones start to form.
The head and trunk begin to develop
Arm, leg limb buds appear. The brain begins to develop. Eyes and ears begin to form. The heart continues to develop and beats a regular rhythm -
Development in the brain and face.
4 chamber heart, lungs form. Ears develop, hips, nose, trunk and neck straighten.
Baby is about 1/2 inches -
Baby's head is big, all baby parts are present. Eyes, ears, arms and legs.
Baby is about 1 1/4 inches. -
Genitals Develop.
Head is big.
Teeth buds form
Baby is about 2 inches in length and weighs about 1/3 ounces. -
Finger nails.
Face has features.
Intestines in abdomen.
About 2 1/2 inches and weighs about 1/2 ounces. -
Baby's sex will become more apparent
Baby can swallow and make urine
Baby is about 3 1/2 inches and weighs about 1 1/2 ounces. -
Baby is moving but mom can't feel it.
Baby is about 4 1/2 inches and weighs about 4 ounces. -
Baby has nails, fingerprints, eyebrows, lashes and possibly some fine hair.
More active
Heartbeat can be heard with a stethoscope
Lowest limit of viability
Baby is about 7 1/2 inches and weighs about 1 pound. -
Baby begins to hear
Digestive System works.
Vernix Caseosa covers the baby. -
Wrinkly skin and translucent and pinkish red skin.
lung development and regular sleep and wake patterns
Baby is about 8 inches and weighs about 1 1/3 pounds. -
Regular sleep and wake patterns
all organs and structures found
breathing movements occur but are underdeveloped.
Covered in Lanugo
May begin to suck thumb
Baby is about 6 1/2 inches and weighs around 11 ounces. -
Eyes may open.
Nervous system, and starts breathing.
Baby is about 10 inches and weighs about 1 1/2 pounds. -
Finished most major development.
Rapid weight gain begins
Lanugo starts to fall off
Baby is about 11 inches and weighs about 3 3/4 pounds. -
Continues to grow fingernails and toenails.
Develop breathing motion
Responds to light
Skin is pink and smooth
Baby is about 12 inches and weighs about 4 1/2 pounds -
Takes up most of the amniotic sac.
Starts to turn head down to prepare for labor.
Baby is about 13 1/2 inches and weighs about 6 pounds.
Will continue to gain about 1/2 a pound a week until delivery. -
Brain, lungs and liver are still developing.
Brain will double in size between week 35-39
Lung development during the last few weeks helps with fewer complications after birth.
At week 39 baby is considered full term
weight gain helps with temperature control once born.