How long does it take for a pregnant woman to give birth?

pregnancy usually lasts 9 months

the birthing process can last minutes to hours

9 months. But sometimes children are born premature which means they were born too early.

Hope this helps :)

sorry, but you do not have posted the diagram.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands