Fetal development by month.
Month 1: Cells teeming
The fertilized egg (zygote) explodes with activity, proliferating wildly and migrating to other areas of the "body" where cells organize according to specialized functions.
Month 2: Body formed
Main structural components facial features, limbs, organs are completely formed. About one inch in length, the fetus is starting to take a baby-like form.
Month 3 and 4: Constant motion
The baby swims, turns and stretches, exercising its developing muscles. It rarely stops moving, although most first-time moms don't feel any movement until the fifth month.
Months 5 and 6: Senses engaged
Several senses are highly developed. The baby strokes its face and body, hears sounds outside the womb and may detect fluctuation in daylight and open its eyes for the first time.
Months 7 - 9: Getting ready
The fetus looks and acts like the baby it will soon become. If born at seven or eight months, it will probably survive but may need breathing support.
From the book Understanding Children.
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