The duration of the 3 mg single dose is four days; if human chorionic gonadotropin (hCG) is not administered within four days, a daily 0.25 mg dose is started and continued until hCG is administered.
A regimen involving a single 3 mg dose lasts for four days; if human chorionic gonadotropin (hCG) administration is delayed beyond this period, a lower dose of 0.25 mg is started on a daily basis and continued until hCG is administered.