Will taking birth control pills delay menstruation?

After taking birth control pills, menstruation may be delayed, which is mainly due to the effect of birth control pills on hormone levels in the body.

Contraceptive pills, especially emergency contraceptive pills and long-acting contraceptive pills, usually contain higher doses of progestin, which temporarily increases the level of progestin in the body, inhibits ovulation, and thus prevents pregnancy. This drastic change in hormone levels may cause the menstrual cycle to be disrupted, resulting in delayed or even absent menstruation.

The mechanism of action of contraceptive pills includes inhibiting and delaying ovulation, and changing the growth cycle of the endometrium, making it unfavorable for the implantation of the fertilized egg. In this process, the growth and shedding of the endometrium may be disturbed, resulting in irregular menstruation. However, the time of delayed menstruation varies from person to person. If the menstruation is delayed for no more than one week, it is usually within the normal range and you can wait and see for the time being. If the menstruation is delayed for too long, it is recommended to seek medical attention in time and seek medical help.

Note: Long-term or excessive use of contraceptive pills may increase the risk of irregular menstruation, amenorrhea, and even infertility. When using contraceptive pills, be sure to take them under the guidance of a doctor and follow the doctor's instructions to adjust the dosage and frequency of use.