| ||
Script: Ibyumweru 8 bigaragaza kurangira igihe cy'isoro. Muri iki gihe, isoro ry'umuntu riba ryararumbutse kuva kukaburungu kamwe kugeza hafi k'utuburungu miriyardi 1 aribyo bigira ibihimba birenze 4,000 by'umuntu. Ubwo rero isoro riba rifite ibirenze 90% by'ibihimba biboneka mu bantu bakuru. | ||
All ages referenced to fertilization, not last menstrual period. |