Want to know what's going on in there? During the first trimester, your little baby is growing and developing everything he needs to be born. Babies change from a grouping of cells to an embryo and finally to a fetus by the end of the all important first trimester. Learn exactly what is forming each week and get an intimate glimpse into the early stages of your baby's life.
Approximately 2 weeks after your menstrual period, something amazing happens---conception takes place. The egg and sperm meet for the first time and a new life is formed. As it travels down the fallopian tubes, the little ball of
cells rapidly changes and grows each day. By the time you suspect you
are pregnant (4 weeks gestation), the baby has already implanted into
your uterus and the embryonic period is beginning.
Week 5: By the fifth week, the baby's heart begins to beat.
8-9: Fingers and Toes begin to form and the embryo is now known as a
fetus. The fetus is approximately 1/2-1 inches long and actually has
everything that it will need to be born. All of it's organs are formed
and are beginning to function. Brain waves are even present and are
Week 12: Your baby actually has fingernails and
toenails although they are very tiny! His or her genitals are clearly
formed, but it is still too little to be seen clearly on an ultrasound.
Your doctor will be able to clearly hear the heartbeat on doppler by
this time. If you take an ultrasound of your baby at this age, you
might even get a glimpse of him sucking his thumb or making a fist!
Your baby can even feel pain even though he is only 3 inches long.
Information given on this website can not be construed as medical advice. Please check with your health care provider when making decisions regarding you or your child's health care.
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