Step 1: Understanding the Concept:
Contraceptive methods are divided into natural, barrier, chemical, and surgical categories.
Step 2: Detailed Explanation:
Natural/Traditional methods work on the principle of avoiding the chances of ovum and sperm meeting without using external devices or chemicals.
Coitus interruptus (Withdrawal): The male withdraws the penis from the vagina before ejaculation.
Lactational amenorrhea: Absence of menstruation during intense breastfeeding, which prevents ovulation for up to 6 months post-childbirth.
Step 3: Final Answer:
These are Natural methods.