胞
=
包
+
月
:
The moon (月) got a child in front of the aorta (ao1). Beelzebub (b) finds that the placenta (胞) is a small moon cake, which he places in his colorful handbag (包) for later.
胎
=
台
+
月
:
The moon (月) is talking to Tecumseh (t) over a counter (台) in front of the airplane (ai1) because it wants to get an abortion to get rid of its fetus (胎).