Clinically, it is impossible to detect if you have taken birth control pills, such as the short-acting pill, which inhibits ovulation and alters the thickness of the endometrium, and will act as a contraceptive in clinical practice. However, the pill is not the only factor that can affect ovarian ovulation, other causes may also prevent ovarian ovulation, so it is difficult to determine clinically whether ovarian ovulation dysfunction is caused by taking birth control pills. If endometrial thinning occurs, it is not just taking short-acting contraceptives that make the endometrium thin in clinical practice, but also if it is due to lowered estrogen. So clinically the oral contraceptive pill is not detectable, but it is recommended that women use condoms for contraception or an IUD for contraception in clinical practice.