Yes, it is possible that certain birth control pills may affect lactation in some cases. If you notice a decrease in your milk production while taking a specific contraceptive pill, it may be worth discussing with your pharmacist, a lactation specialist, or your doctor to explore other potential factors. It is important to maintain a consistent breastfeeding schedule and consider pumping to stimulate milk production. If the issue persists or worsens, particularly if you are only taking the pill for contraception, it may be advisable to stop taking it and consider using an alternative method such as condoms.