Normally, you must stop 3 weeks after the positive pregnancy test, which means you stop after the pregnancy scan. Some clinics already stop when the pregnancy test is positive. However, the clinical investigations demonstrating that you can stop that early cannot exclude that up to 5% of women will have an abortion stopping early. Therefore we recommend that you continue until the pregnancy scan.

Women who have become pregnant with frozen-thawed embryos in a hormone controlled cycle need to continue until 3 weeks after the pregnancy scan.