Weeks 25-28 (Month 6)
Let your spouse put an ear to your belly -- he might be able to pick up baby's heartbeat (no stethoscope required). Inside the womb, the formation of tiny capillaries is giving baby a healthy pink glow. Baby's also soaking up your antibodies, getting the immune system ready for life outside the womb. Eyes are forming, and baby will soon perfect the blink -- perfect for batting those freshly grown lashes.
I want to go home and try out the hearing-the-baby's-heartbeat game. If the babies have my genes they'll be able to blink, but never wink.