<prompt> Legal age by which fetus is capable of independent existence is ?240 days230 days220 days210 days  <response>: Ans. is d i.e., 210 days Viability means the physical ability of a foetus to lead a separate existence after bih apa from its mother, by viue of a ceain degree of development. A child is ble after 210 days 7 months of intrauterine life, and in some cases after 180 days 6 months but in most of these cases fetus is immature. Full term mature infant show :- Length crown-heel length 48-52 cm, head circumference 30-35 cm. Ossification center at lower end of femur appears at the end of 9 months or just before bih and Ossification center of cuboid and upper tibia may also present Note : some ossification centers are also present, but they appear before the attainment of bility so their presence does not have impoance. These are i Clavicle, mandible, ribs veebra - at the end of 2nd month, ii Calcaneumos calcis and manubrium sterni - at the end of 5th month and iii Sternum - at the end of 6 month. Other center which appears at attainment of bility is primary ossificaion center of talus which appears at the end of 7th month. 