2007-06-19 17:21:43 · 6 answers · asked by siri 1 in Pregnancy & Parenting ➔ Pregnancy
As far as organs go, the heart and liver. The embryo takes it's shape starting out as (what looks like) a tube. Then it develops arm and leg buds and a liver bulge. The heartbeat can be seen in ultrasounds at about 8 weeks.
2007-06-19 17:24:17 · answer #1 · answered by Mickey Mouse Spears 7 · 0⤊ 0⤋
One of the very first things to develop is the central nervous system, this includes the spinal cord as well.
2007-06-19 17:27:12 · answer #2 · answered by Amber D 3 · 0⤊ 0⤋
the heart is the first to fully form. by 5 weeks its already starting to develop ventricles. the spinal column begins to develop, though doesn't close off until sometime later.
2007-06-19 17:25:44 · answer #3 · answered by mums_the_word 3 · 0⤊ 0⤋
Immediately after fertilization, the sex is determined. From there, the neural tube begins to develop. Everything kind of quickly goes from there.
2007-06-19 17:25:34 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Dear friend, check out anglicansforlife.org, under pregnancy, the prenatal slideshow. Take care!
2007-06-22 02:21:16 · answer #5 · answered by Anonymous · 0⤊ 0⤋
I want to say the spinal cord.
2007-06-19 17:24:40 · answer #6 · answered by angelsong_04 3 · 0⤊ 0⤋