The short-acting contraceptive pill and the emergency contraceptive pill are the most commonly used in clinical practice. If you take the pill, it can cause the following side effects: First, because the pill is a combination of estrogen and progestin, it can cause endocrine disruption, which can lead to menstrual disorders or irregular vaginal bleeding. Secondly, short-acting contraceptives are likely to cause blemishes on the face, mainly caused by the estrogen in short-acting contraceptives. Third, the pill can cause weight gain, which is also one of the side effects. The side effects are even greater if the pill is taken orally, because it is a highly effective progestin, containing five times more progestin than the short-acting pill, which may cause damage to liver and kidney functions, and may also inhibit ovulation and break the natural ovulation pattern of the ovaries, causing menstrual disorders.