1. Rhythm Method: This method involves tracking menstrual cycles to predict fertile days. Irregular cycles make it difficult to accurately predict ovulation, reducing its effectiveness. 2. Fertility Awareness-Based Methods: These methods require daily monitoring of signs like basal body temperature and cervical mucus. Irregular cycles can lead to inconsistent signs, making it challenging to identify fertile days. 3. Calendar Method: Similar to the rhythm method, this approach relies on cycle regularity to calculate safe days for unprotected sex. Irregular cycles compromise its reliability.
