The first thing you need to do is to get a good deal of money from the company. During the preparation period of intercourse once a day is more frequent, if too frequent intercourse may lead to a decline in the quality of sperm, at the same time may also be physically tired and weak, mental tension and other reactions, may also have a rejection of the psychological intercourse, so intercourse once every two days is better. The best way to avoid excessive psychological pressure or nervousness during the preparation period is to choose the right time to have sex, and generally have sex every other day during the ovulation period to improve the pregnancy rate. At the same time also need to pay more attention to rest, to ensure adequate sleep, it is best not to often stay up late and tired.