(upbeat music)
- It's week six and your little sweet pea
is the size of a sweet pea,
still tadpole or prawn shaped,
that baby shrimp won't
be a shrimp much longer.
In fact, he or she is growing quickly,
measuring 1/6 of an inch
from crown to rump this week.
Why do we measure from head to tail?
Right now your baby's body is
curved over into a C shape.
And eventually, when those
tiny legs start to form,
your little one's knees will be bent
and tucked up under the chin.
And that makes it tough to measure
the head to toe length of the body.
Instead, doctors measure from cute crown
to just as cute rump, until
baby hits the 27 week mark,
when a head to toe measurement takes over.
Incredibly, your baby is starting to gain
those features that hint at the
adorable little one to come.
You know, human stuff, like a head,
and the beginnings of the facial features
you'll soon cover with kisses,
the mouth, eyes, jaw and chin.
See those little indentations where
you think those pinchable cheeks will be?
No, those aren't dimples, they're earbuds.
Talking about budding buds, check out
the limb buds that are starting
to sprout from the trunk,
they'll grow into arms and legs.
And very soon nodules will develop
at the ends of those limb buds
and eventually become
small hands and tiny feet.
And that's just what's
happening on the outside.
There's plenty of activity
on the inside as well.
Major organs are taking
shape, including the kidneys,
liver and lungs, and that brand new heart
is already beating an impressive
80 to a 100 times per minute.
A rate that's rising every day.
Fueling all this growth is the yolk sack,
a balloon-like structure
attached to the embryo.
But the early placenta,
known as the chorionic villi,
has started to develop
and form blood vessels,
gearing up to take over
and bring nutrition
to the fetus when the
yolk sack disappears by
the end the first trimester.
(upbeat music)
