A cold is a bacterial or viral infection that can cause the eggs to be infected. It is also not recommended to take medication during the preparation period, as improper use of medication can cause fetal abnormalities later. It is not advisable to use contraception during the flu period, as bacterial or viral infections can also affect the development of the fetus after conception. During the preparation period, it is necessary to exercise properly and it is recommended to keep warm and to eat more foods containing vitamin C, such as oranges and grapefruit, which can strengthen the body’s resistance and prevent colds. It is also recommended to drink more water to promote recovery and wait until your body has fully recovered before you can get pregnant. During the preparation period, you need to monitor your follicles with regular ultrasound to see how they are developing.