Chorionic gonadotropin (chorionic gonadotropin) the next day ovulation test paper strong positive is not necessarily not ovulated. After the injection of chorionic gonadotropin, the body’s hormone level secretion has changed, which directly affects the results of ovulation test paper, in the next day ovulation test paper strong positive can not be sure whether ovulation has occurred. If women who usually have ovulation disorder, when ultrasound monitoring of high-quality follicles, in order to improve the rate of ovulation, can be injected with chorionic gonadotropin, so that the follicle rupture successful ovulation, to improve the chances of pregnancy. In order to clarify whether ovulation is occurring, there are uncertainties in using ovulation test strips, ultrasound monitoring is required, and if the follicle is successfully ovulated, couples can be instructed to cohabitate to improve the pregnancy rate. If the follicle is successfully ovulated, the couple can be instructed to have intercourse to improve the pregnancy rate. If the ovulation test paper is strongly positive on the second day of chorionic villus promotion, it is necessary to go to the hospital for ultrasound to determine whether ovulation has occurred.