Hi.im 20.i Have Kallman Syndrome.my Penile Length When Is Erected

hi.im 20.i have kallman syndrome.my penile length when is erected is 9 cm and the circumference is 9/5cm.i have been injected testosterone from 3 years ago and now my doctor told to inject hcg 2 times per week.does it effect on the length? im worried to get married.thank you for your answer