Single‐dose levonorgestrel showed no clear difference in observed number of pregnancies (all women) compared with split‐dose levonorgestrel (moderate certainty).
The review found no eligible studies for this question.
Single‐dose levonorgestrel showed no clear difference in specific side effects ‐ nausea compared with split‐dose levonorgestrel (moderate certainty).
Single‐dose levonorgestrel showed no clear difference in specific side effects ‐ vomiting compared with split‐dose levonorgestrel (moderate certainty).
Single‐dose levonorgestrel showed no clear difference in specific side effects ‐ spotting/bleeding after treatment compared with split‐dose levonorgestrel (moderate certainty).
Single‐dose levonorgestrel leads to lower menses ‐ early compared with split‐dose levonorgestrel (high certainty).
Single‐dose levonorgestrel showed no clear difference in menses ‐ delay compared with split‐dose levonorgestrel (low certainty).