Hi, Yes, sometimes stress can lead to irregular periods. Psychological changes by affecting the reproductive hormonal balance can lead to irregularity in menstrual cycles. Fertyl tablet contains clomiphene citrate, which helps in ovulation induction. After taking the tablets we can track the ovulation with follicular study and can plan for pregnancy around the period of ovulation. To regularize the menstrual cycle general steps that can help are: - Regular calories burning exercises - Healthy balanced diet and adequate sleep - Decreasing the psychological tensions - Maintaining normal body mass index. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN