For the most accurate results, wait until at least seven days after ovulation to ensure the hCG levels are high enough to give a positive test. However, this can also depend on your menstrual cycle because while most people ovulate 10 to 14 days before their menses, some are irregular. "For example, most [menstruating people] with 28 (day) cycles will ovulate somewhere around the 14th day of their cycle or approximately two (weeks) into their cycle. This can vary from cycle to cycle," Dr. Thornton says. "Those with shorter menstrual cycles typically ovulate sooner in their cycle and women with longer cycles often ovulate later. If a [person] does not have regular menstrual cycles this can sometimes be a sign that they are not ovulating and always warrants an evaluation with a gynecologist or fertility specialist."