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Month 2
During the 8 week period, the baby has grown to .63in and is now an embryo. Sex organs of baby start to become more clear. -
Month 1
During the first four weeks, the baby is .1-.2mm and considered as an ovum. Face and neck,lungs,stomach, and liver start to develop. -
Month 3
By 12 weeks the baby is now 2 inches and is nearly considered a fetus. Eyelids and ears, tip of nose is visible, arms and legs are well formed. Baby's about to enter the growth and maturation stage, in which organs and tissues will grow and develop rapidly. Baby at 12 weeks is opening and closing his or her fingers and curling toes. And baby's brain is developing fast! -
First Trimester Body System Development
The cardiovascular system starts to take shape as well. This includes the heart, blood, and blood vessels. During the first trimester, the heart develops four chambers, blood vessels start to evolve, and blood cells begin to form. The fetal heartbeat can be detected during the first trimester as well. -
Brain Development in the First Trimester
The brain grows at a remarkably rapid rate. By the end of the third week of gestation, the embryo has formed the three parts of the brain (the forebrain, midbrain and hindbrain). One week later, the brain begins functioning. -
Development month 4
Blood vessels and heart are fully developed. At 16 weeks the baby is 6 1/2 - 7 inches and is now a fetus -
Physical development month 5
Muscles are developing, hair begins to grow. Size of baby At 20 weeks, the fetus is 11-12 inches long. -
Physical development month 6
Inner ear is fully developed. At 24 weeks, the baby is 12 inches -
Month 7
At 28 weeks, the fetus is now 14 inches. Hearing is fully developed, and developing reserves of body fat. Body system is the fetal nervous system is developed enough so your baby is startled by loud noises outside the womb — and may even turn his head toward the sound of your voice! Another exciting development: At 28 weeks, fetal brainwave activity features sleep cycles, including REM -
Brain Development in the Second and Third Trimester
By the start of the second trimester of pregnancy, all of the major structures of the brain are in place and functioning. From this point on, the brain continues to develop and mature. The brain connects to all parts of the body during this time, and the connections are complete by the seventh month, in a process known as synaptogenesis. Rapid brain and head growth occurs during the eighth month. At this time, babies in the womb are known to be able to recognize their mother’s voice. -
Month 8
most internal systems are well developed.During the 32 week period, the fetus is now 18 inches. -
Month 9
Brain is developing rapidly and baby is ready to come out of womb. For the last month, 36 weeks, the baby can grow up to 18-21 inches long.
