For fertility the basic tests required to decide whether you need any treatment or not are
Female partner: AMH to assess the ovarian reserve.It9‘s best to interpret the results with antral follicle count done on day 2/3 of menses
Tubal status : Whether patent or not.Can be best evaluated with hysterosalphingography (HSG)
Ultrasonography: A Basic pelvic scan to rule out any uterine pathology
Hormones: TSH , Prolactin
Male partner: Semen Analysis
These tests will give you a basic idea to plan your pregnancy.