Second Trimester Month 4 - Month 6
By: Mallory Ammons
Month Four 12 weeks sexual differentiation
- Sperm carries X or Y chromosome.
- Developed during the fourth week.
- Male fetus- analog
Month Four Development
- Fetus is 3 inches long
- Face looks more human like
- Eyelids form but remained close until the 7 month
- Amniotic Sac protects the baby
- The baby breathes Amniotic Fluid
- Oxygen received from moms placenta
- 2,000 to 2,700 calories a day
- increase protein,iron and calcium
- whole grain
- veggies
- lean meat
- milk
Month 5
- During the fifth month the outer ear has developed but not fully. It won't fully develop until birth
- Ultrasound- Helps visualize defects of the head, chest and limbs
- Fetus is 9 inches long
- Fluttering can be felt my the mom
- movements happen more often
- nervous system is more developed
- Sleep and wake like a new born. This is called (Sleep Cycle)
Month 6
- 13 inches long
- baby will gain 1/2 pound per week
- fingernail formed and growing
- Lanugo forms due to vernix
Amniotic Fluid
- Keeps baby warm
- provides lubrication so you won't have webbed feet or hands
- Allows baby to move easily
- Protects baby
- Amniotic Fluid is 98% water and 2% salt
- Baby aids to Fluid by urinating in it, drinks it's urinates again baby consumes 13oz of fluid a day
Month 6 Twins
- Twins only occur in 1% of all pregnancies
-Fraternal-70%
-Identical twins development is not explained
-Fraternal twins development is due to the mother
Identical Twins
- Fertilized by one single sperm
- Splitting occurs during first week
- stage will split and determines how twins will implant
Fraternal Twins
- Non-identical twins develop from two fertilized egg cells.