Photo copyright (c) 1998, Fundacja Zrodlo Zaklad Wychowawca.
For reprint information, please contact Focus on the Family at
Follow with us as recent scientific and technological advances have allowed us to directly observe life as it develops in the womb.

Day 21          The heart begins to beat

Day 28          The backbone and muscles are 
                       forming.   Arms, legs, eyes, and ears
                       have begun to show

Day 30          At one month old, the embryo is 10,000
                       times larger than the original fertilized
                       egg and developing rapidly.  The heart
                       is pumping increasing quantities of
                       blood through the circulatory system.  
                       The placenta forms a unique barrier 
                       that keeps the mothers blood  
                       separate while allowing food and
                       oxygen to pass through to the embryo.

Day 35          Five fingers can be seen in the hand.  
                      The eyes darken as pigment is 

The embryo begins to move spontaneously. The jaw forms, including teeth buds in the gums. Soon the eyelids will seal to protect the embryo's developing light sensitive eyes, and will reopen at about the seventh month.


At a little more than an inch long, the developing life is now called a fetus-Latin for "young one" or "offspring." Everything is now present that will be found in a fully developed adult. The heart has been beating for more than a month, the stomach produces digestive juices and the kidneys have begun to function. Forty muscle sets begin to operate in conjunction with the nervous system. The fetus' body responds to touch, although the mother will not be able to feel movement until the fourth or fifth month

week 8week 8

At this time, the fetus is about two inches long. Urination occurs. The face has assumed a baby's profile and muscle movements are becoming more coordinated.

week 11week 12
 WEEK 11

The fetus now sleeps, awakens and exercises its muscles energetically-turning its head, curling its toes, and opening and closing its mouth. The palm, when stroked will make a tight fist. The fetus breathes amniotic fluid to help develop its respiratory system.

week 12 week 12

Fine hair has begun to grow on the head, and sexual differentiation has become apparent.

3.5 months3.5 months3.5 months

By the end of this month, the fetus is eight to ten inches in length and weighs a half pound or more. The mother will probably start to "show" now. The ears are functioning and there is evidence that the fetus hears quite a bit: the mother's voice and heartbeat as well as external noises. The umbilical cord has become an engineering marvel, transporting 300 quarts of fluids per day and completing a round-trip of fluids every 30 seconds.

4 months4 months

Half the pregnancy has now passed, and the fetus is about 12 inches long. The mother has definitely begun to feel movement by now. if a sound is especially loud or startling, the fetus may jump in reaction to it.

5 months5 months5 months

Oil and sweat glands are functioning. The delicate skin of the growing baby is protected from fetal waters by a special ointment called "vernix." If the baby were born in this month and given the proper care, he would survive.

6 months
 WEEK 12
3.5 Months
   4 Months
  5 Months
6  Months
Designed And Managed By