During the first trimester, the sperm and egg unite and begin to develop the placenta and basic organs and features by 8 weeks. In the second trimester, the baby's movements become more coordinated and detectable, and features like fingers, toes, and sex become apparent between 13-22 weeks. In the third trimester, the baby gains weight, bones harden, lungs mature, and positioning occurs for birth from 28 weeks until birth at 40 weeks.

2. BABY DEVELOPMENT
FIRST TRIMESTER
Sperm and egg unite in your
fallopian tube. SECOND TRIMESTER
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4 week later implantation begins.
And the placenta, that will nourish 13-14 Weeks the baby’s intestines have moved from the umbilical
cord to the baby’s abdomen. The baby also begins to form urine
your baby also begin to from.
and discharge it into the amniotic fluid.
The embryonic period begins in the
th The baby’s sex becomes apparent. The baby’s arms are almost to
5 week. By this time the baby’s
the final relative length they’ll be at birth. The neck has become
brain, spinal cord, heart and other
more defined and the baby is almost 31/2 inches (87 millimeter)
organ begin to form.
15-16 weeks the baby can make sucking motions. The baby’s
By the end of this week the baby is movements are becoming coordinated and can be detected during
about the size of the tip of a pen. ultra sound exams.
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6 week your baby heart is pumping 17-18 weeks fat stores begin to develop under the baby’s skin. The
blood. Basic facial features will begin fat will provide energy and help keep the baby warm after birth.
to appear. The baby begins to hear.
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By 8 week six weeks after 19-22 weeks for girls the uterus and vagina might begin to form
conception the baby’s arms and legs this week. You might be able feel the baby’s first movement. The
are growing longer. Ears are forming baby can swallow and hair becomes visible baby might be 7½
and eyes are visible. Baby might be inches (190 millimeters)
about ½ inch (11-154 millimeters) 23-27 weeks fingers and footprints form for girl uterus and ovaries
long. are in place with a life supply of eggs. Baby’s around these times is
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10 -12 week the baby’s eyes regularly sleeping and waking. Baby also responds to your voice.
The hands and startle reflex are developing. Lungs and nervous
begin to round. Eye lids begin to
system are continuing to mature.
close to protect the developing eyes.
The baby’s head still makes up about
half of its length. Face now has
human like features. Finger nails
develop, and baby is now officially
described as a fetus.
Third trimester
28-30 weeks the baby’s eyes open and he or she is gaining weight which is smoothing out any wrinkles in his or her skin. The baby’s
bones are fully developed but still soft and pliable. Eyes are wide open a good part of the time. Red blood cells are now forming in
the baby’s bone narrow.
30-33 weeks the baby’s central nervous system has mature to the stage where it can control body temperature. Babies at this time
also practice breathing even though their lungs are not fully formed. The babies can also detect light entering their eyes.
34-37 weeks the baby’s finger nails grow to his or her finger tip. The baby weights rapidly and is about ½ pound (227 grams). The
baby also has positioned his or her self for birth.
38-40 weeks the baby’s brain weight about 14 ounces (397 grams). The baby’s brain continues to develop after birth. Your placenta
gives baby’s antibodies to protect them from infections after birth.
THE 40TH WEEK YOUR BABY IS DUE.