A case of vasectomy is said to have failed as the vasectomised person&;s wife gives bih to a child ten months after the operation. Which one of the following is the most probable cause?

Social & Preventive Medicine

A case of vasectomy is said to have failed as the vasectomised person&;s wife gives bih to a child ten months after the operation. Which one of the following is the most probable cause?

A study is to be conducted with regards to the fat content…

'There has been a gradual increase in number of non-communicable disease cases…

All of the following are done to remove Confounding except