It is estimated that many of the MM who have done IVF have had some similar questions: wrong, right? I can’t get pregnant in the first place, why do I need to take birth control pills? I’m here to get pregnant, take birth control pills, this is not not pregnant? Why do I have to take birth control pills before I can do anything? Why do I have to take birth control pills for IVF? What does it do? In short, MMs think that birth control pills are used for contraception, and it’s strange to use them to help you get pregnant. The original follicle is like this Usually, a woman’s natural cycle will give birth to a few to a dozen small follicles in the ovary every month, and there will be a strong follicle, which predatory absorption of most of the nutrients in the ovary, their own development and growth at the same time to inhibit the growth of other small follicles. As it absorbs and grows, the strong follicle produces an egg, and when the follicle matures and ruptures to release the egg, we have a chance to conceive. A down-regulation shot is an important step in the IVF treatment process to prepare for the ovulation shot. The signs of successful regulation before ovulation injection are: follicles of similar size, all <5mm; estrogen (E2) blood value <40pg/ml, luteinizing hormone (LH) <10mIU/mL, and lining <5mm. This means that all the follicles in the ovary have been inhibited from growing well, and there are no large follicles that stand out; hormone levels are low, so the follicles don't get more nutrients to continue to grow; and the lining is slow to grow. The lining is also slow to grow. Under this premise, we can successfully enter the ovulation stage: through ovulation injections and ovulation pills, we can start to provide a large amount of sufficient nutrition for the ovaries, so that each follicle is well-fed, well-fed, even and strong synchronized growth! The Role of Birth Control Pills In order to increase the "cumulative pregnancy rate" (one egg retrieval, two or more implantations), in vitro technology expects multiple mature eggs to be obtained in one ovulation, which means that it is not desirable to have only one strong follicle; the birth control pills inhibit the secretion of gonadotropins, which inhibits the growth of strong follicles, making most follicles grow in a synchronized manner, and allowing for multiple quality and comparative growth. growth, and can get multiple mature eggs of better quality at the same time. Some MMs have uneven follicle sizes, follicles, lining and hormones are not synchronized; in order to produce more good quality eggs, they need to take birth control pills first and then take down regulation injections. Therefore, MMs doing IVF should never think it is strange for doctors to prescribe contraceptive pills to you. Contraceptive pills are only to regulate the endocrine system and inhibit ovulation, so as to avoid the formation of cysts after ovulation which will affect the subsequent treatment. Allow ovaries to rest so that the quality and quantity of eggs in the treatment cycle is better, making it easier to calculate the time and schedule the treatment. To improve the number of eggs retrieved as well as the success rate of IVF, you just need to use the medication as prescribed by your doctor.