Down-regulation injections are mainly used in the down-regulation program of IVF, and it is not recommended to take a bath immediately after the stomach is injected with down-regulation injections, you can wait for about 1-3 days for the needle eye to heal and then take a bath. The injection is divided into subcutaneous injection and intramuscular injection, the injection is mainly to improve the synchronization of follicular development and inhibit spontaneous ovulation. As the injection will leave a needle eye, it cannot heal immediately within a short period of time. If you take a bath immediately after the down regulation injection, it will cause bacteria and other pathogens to enter the inside of the skin through the needle eye and cause infection. It is generally recommended to take a bath after the injection on the stomach for about 1~3 days after the needle eye heals and recovers, and after the bath, you should pay attention to keep warm to avoid getting cold, keep your mood stable in daily life, avoid large emotional fluctuations, and go to the hospital for regular checkups.