Week 31: More organs are becoming developed, like the bladder, which now passes water through it.
Up to this point the liver produced red blood cells, but now the bone marrow is doing so!
The baby's fingernails are developed (they may need cutting once born 🙂)#40weeks40facts pic.twitter.com/61dgblZeq4

— National Right to Life (@nrlc) March 30, 2021