First month.
The baby (let’s say it’s a girl) spends her first month growing from a dot you can hardly see into a little girl measuring about the size of one of your teeth. As small as she is, she already has a backbone and the first beginnings of arms, legs, nose and eyes. She even has a heart that’s beating.
Second month.
By the time the second month has passed, our baby not only has arms and legs. She has fingers, toes, elbows, and knees. And a definite little face.
Third month.
This is the time when the baby starts to develop her shouting equipment. She begins to form her vocal cords, which she’s going to need when she starts yelling for dinner.