Talk to Urologist on Semen Quantity

dear admin kindly post my question , keep me anonymous ,i m 24 year old male married, mein ye pouchna chahta jb bh mein intervourse krta hn jo first ejaculation hoti h usmy semen quantity kafi hoti h i think approximately 3 to 4 ml but jb second timr inter courde krta after 7 to hours semen quantity 1ml sy bh kam hoti h kia ismy koi health problem involve h