When to test with Surecheck? When did your last period start? What’s your usual cycle length? I don`t know irregular 21 22 23 24 25 26 27 28 29 30 31 32 33 Minimal length if period cycle 21 days. Maximum 33 days. calculate First day you can test with Surecheck Add to my calendar This result is based on the information you have provided.
