By the time you were just seven weeks old and only about an inch [2.5 cm] long, early forms of all 206 of your adult bones were in place, although they had not yet ossified, or turned into hard bone.
در هفتهٔ هفتم با این که اندازهٔ جنین کمتر از ۳ سانتی‌متر است ،‏ تمام ۲۰۶ استخوان بدن که در این مرحله نرم هستند به وجود آمده‌اند .‏