questions:  query regarding  a  yearling  showing the signs of oestrous in 11 month  
 answers:  leave the 1 st 4 - 5 oestrous cycle  to get a fully mature graffian follicle , early maturity can be obtain in good nutritional status  , but the puberty is not the sexual maturity  , so we should wait for another 5-6 month for the sexual maturity [ since the heifer is a cross bred one,   it should be insiminate at the age of 18-24 month of age , so that it can release a mature ova from the overy , if  it is inseminate at the present age  i.e , on 11 th month age develomental anomalies may occur  or  it may fail to consive foe several insemination until it get the sexual maturity ]