The mechanism for X inactivation will occur during the embryonic stage.

The failure is believed to have occurred during the third stage burn.

This occurred during the early stage of its function, just before the sphere- picked him up to move him through time.

However, a critical error occurs during the traveling stage and Hong returns further back in time by three years than originally planned.

These sores occur during the primary stage of syphilis.

This sudden death is due to a severe cardiac failure that occurs during the acute stage of infection.

Much of the action occurs during the formative stage of rule making.

Instruction fetch occurs during the first stage, decode and issue during the second.

Migration probably occurs during the juvenile stage, as male and female adults are mostly sedentary.

The most serious judicial misconduct occurred near or during the remedial stage.