<prompt> Denominator of maternal moality ratio is -1000 total bihsMid year population1000 live bihsTotal live bihs  <response>: maternal moality ratio Total number of female deaths due to complications of pregnancy, child bih or within 42 days of delivery from puerpural causes in an area during a given year Divided by Total number of live bihs in the same area and year X 1000 or 100000 Reference Park;s textbook of preventive and social medicine 23rd edition pg 557 