i am trying to use the chinese calender to conceive. I have a doubt, i was born on the 2nd of september 1982.

Dear Sir, i am trying to use the chinese calender to conceive. I have a doubt, i was born on the 2nd of september 1982. My mum says i will turn 30 this year september. Meaning i have completed 29 years and running 30. Well i think like the westerners, that i will turn 29 this september and have completed 28 years. So please correct me if i am wrong and advise me on which age category should i follow, to have a child of my choice of gender. Thank you very much. I would greatly appreciate your help. kind regards, Gaithiry