Prognostic factors affecting male infertility 1. Duration of infertility: When the period of infertility without contraception exceeds four years, the monthly pregnancy rate is only about 1.5%. 2. Whether it is primary or secondary infertility: in the case of one party with normal fertility, the chances of the couple obtaining fertility mainly depend on curing the party with absolute or relative infertility. 3, the results of semen analysis: semen analysis is an important basis for evaluating male fertility, and abnormal results suggest the presence of diminished fertility, 4, the age and fertility of the female partner: a woman’s fertility is only about 50% of that of a 25 year old at 35 years of age, decreasing to 25% at 38 years of age, and may further decrease to less than 5% over 40 years of age. In assisted reproduction, the age of the woman is the most important factor affecting the success rate.