Hello well every contraceptive method has its own advantage and disadvantage and also the failure rate.. if you have a kid already and looking for spacing between the next kid then it is better to go for contraceptive device if you have already completed the family then you can go for tubectomy or vasectomy as it is the best method available... apart from that you can go for oral contraceptive device because the failure rate is very less but then the side effects like weight gain and all So I need more details