HI Well come to HCM Appreciate your concern Pregnancy is more natural phenomenon rather than physiological one Depends upon certain compatibilities, like presence of ovum and sperm at the time of coitus, Ovulation is must for production of ovum Sperm should be normal and in sufficient quantity with other normal parameters In absence of all these conception may not be possible Advise: get done some test 1) Ovulation study, hormone profile, semen analysis with abstinence period No tonic would give any result Hope this information helps, take care.