A 17 week old fetus will weigh about five ounces and is about five inches long. The baby will change and grow fast. Your fetus is starting to look like a baby.
A 17 week fetus would a) be 300 grams (very unlikely) and could survive in any manner after delivery injects a sense of false hope that I fear might lead prospective parents to have even more unrealistic expectations at the margins of viability (which are 21-22 weeks, not 24 as the book suggests).
A 17 week old fetus is about the size of a baked potato. With an ultrasound you can see some of their features. They look more like a baby now.
According to Whattoexpect.com, most of the growth occurring in week 7 happens in the head. The eyes are forming and already have some pigmentation. Eyelids are almost completely developed over them.
At 16 weeks the fetus is about 5" long and weighs about 3 oz. The head is becoming more erect and its toe nails are starting to grow. Its tiny arms and legs have also started to develop.
You can find more information here: babycenter.com/fetal-development-images-....
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