hI Nisha. The best way to avoid pregnancy
is oral contraceptive pills
,but taken regularly.If you are obese
then you can take pills like Yasmin
only after consulting a dr. and before all contraindications to its use have been ruled out.It is to be taken on day 1 of your cycle and continuously for 21 days at the same time. in next 7 day free interval you get your periods and start next pack again after 7 days. So, 3 weeks on and 1 week off.You may take it as long as you want to avoid pregnancy and it suits you.
copper T is also useful and can be safely used for 5 years or 10 years. No weight gain