My wife age 19 year old, we married newly, she miss her periods ,she's period date 26/5/2019 and now till date 26/6/2019 ,we having daily sex, so what's reason of stopped her periods, we meet doctor and after doctor ask urine test, we are 3 time urine test and results also negative, then doctor say, your wife s hemoglobin low, we want start her periods ,how? 1 month live without period ,so main reason?