Abstract: The study was conducted to investigate the opinion about reproductive behavior commodity participation in contraceptive mothers opinion about suitable contraceptive method during breastfeeding in Bangladesh. For this purpose secondary data were collected from Bangladesh Institute of Research for Promotion of Essential and Reproductive Health and Technologies (BIRPERHT), in Bangladesh in the year 1995. The contraceptive effectiveness of lactational amenorrhoea during exclusive breastfeeding the baby, 35.6% mentioned that this period is fully protective from risk of contraception; about 37.9% stated that there is a partial risk of pregnancy. The suckling of the infant appears to trigger the chain of events. Stimulating the hypothalamus and anterior pituitary to release some hormones and inhibit the release of mothers. This has the total effect of suppressing ovulation with contraceptive effect being strongest during lactational period. Mothers in rural and urban area may choose to adopt a contraceptive method during breastfeeding and that is suitable method in this period oral pill 33% and condom 28% by their opinions. The overall distribution of opinion about risk of conception reflects that significantly larger proportion with 99% confidence level of urban mothers think that lactational period does not provide adequate protection from conception. Mothers should be informed about the maternal health benefit of breastfeeding including lactational period and its contraceptive effect, which increases birth interval and maintain good health of the mothers.