(light music)
- Welcome to week five of your pregnancy,
the beginning of your second month.
Hey, only seven more to go.
Your pregnancy is still new,
but that embryo inside of you
is growing fast and furious,
from the size of a poppy seed last week
to as big as an orange seed right now,
around 1/20th of an inch.
Still pretty small, but a
lot bigger than it's been
and getting bigger every day.
Wondering what your growing
baby looks like now?
Actually, not much like a baby.
Your little one has elongated
from a ball of cells
to a teeny tadpole-like shape
with a distinguishable head
and, believe it or not, a tail.
Not to worry though, that tail
will disappear soon enough
and a cute little baby
bottom will take its place.
This week, a primitive heart
begins to form and beat,
pumping blood through your
embryo's emerging shape.
The heart comes first because
blood flow is essential.
Without that blood flow,
organs in the digestive
and nervous systems won't be able to form.
At this early stage, the
design of the micro heart
is still pretty rustic,
with only two tubes pumping
to a really unrhythmic rhythm.
The heart won't be fully
functional until those tubes
fuse together and the
heartbeats coordinate,
activity that requires a brain.
Fortunately, your baby's brain is
well past the blueprint phase.
The neural tube, which will
ultimately become baby's
spinal cord and brain,
is under construction.
And if that's not enough
body building going on,
a rudimentary digestive
system is taking shape too.
There's a tube extending
from the mouth to the
the tail of the embryo, and
this tube will eventually
turn into the stomach, liver,
pancreas and intestines.
(upbeat music)
