With the loosening of the two-child birth policy, many couples in a position to do so are planning to add another baby. It has been many years since they have conceived, can they still have a baby, a boy or a girl, these couples almost always have this question. Perhaps, the first baby was conceived smoothly, but this does not mean that you will be able to conceive a second child. Due to heavy workload, stressful life (such as often stay up late, not enough rest), environmental degradation (such as air pollution, water quality deterioration, too much too frequent use of computers and cell phones and other electrical appliances by too much electromagnetic radiation, excessive use of chemical fertilizers and pesticides or additives in the process of food breeding), diet (such as too much smoking and drinking, overeating) and many other adverse factors, men enter society, suffer from these toxic effects every day. Sperm in the nearly three months of growth and development process, facing this poor living environment. Therefore, men’s fertility is declining, weak sperm, malformation rate rise, sperm acrosome enzyme damage, motility and fertilization ability are insufficient. So, many men say, I used to let my wife or ex-girlfriend get pregnant, now why is this so? Because of the above reasons, it is not surprising that this condition has arisen. From the female side, compared to men, with age, reproductive capacity decline more quickly. The Yellow Emperor’s Classic of Internal Medicine says that women take seven years as a growth cycle, women “four seven, tendons and bones firm, long pole, the body is strong; five seven, Yang Ming pulse decline, the face began to scorch, began to fall.” The woman’s body is the strongest around 28 years old, is the best age for childbirth; 35 years old around the body function gradually decline, to “seven seven, Ren pulse deficiency, Taichong pulse decay less, the days of sebum exhaustion, the earth does not pass, so the shape is bad and no more.” After the age of 35, the woman dominates the fertility of the Chong Ren pulse weakness, fertility significantly reduced, after the age of 40 is even lower, even if pregnant, the rate of miscarriage also increased significantly. Moreover, after a woman is married, the chances of infection in the reproductive system also increase, infection or abortion surgery can easily lead to tubal obstruction, even if the sperm and eggs are normal, but the channel is blocked, the sperm and eggs have no chance to meet on the bridge, so that they cannot conceive, or because of incomplete obstruction of the fallopian tube, ectopic pregnancy can easily occur. The man (husband) for eight years as a growth cycle, “husband four eight, tendons and bones, muscle full strong; five eight kidney failure, fall teeth haggard;” the man around thirty-two years old body is the most strong, this time the most suitable for fertility; forty years old body function gradually decline, to “eight eight, the teeth to go, the …… The five organs are decaying, tendons and bones unraveling (xie) fall, the sky is exhausted …… And no child ear.” Men’s bodily functions decline a little later than women. However, environmental toxicity and poor lifestyle on human reproduction, men are worse off than women. Since the process of male germ cells – sperm – from occurrence to maturation to discharge, a process that takes nearly 90 days, is obviously more vulnerable to damage than the process of female follicles maturing and discharging in a month. Too frequent use of computers, and cell phones are always put in the pants pocket inside the whole day price emission microwave cooking men’s balls, and, men than women more alcohol, tobacco, men more social binge drinking, engaged in the type of work more direct contact with toxicity, more driving sedentary, food additives, fertilizers, pesticides, feed additives these substances are more likely to damage male virility. Therefore, today’s lifestyle and living environment, the harm to men is more than the harm to women, men’s tadpoles struggling in the deep water, often very few can grow up healthy. In order to conceive successfully, the male partner should have sufficient number of sperm, sperm vitality and normal form of sperm to be sufficient, moreover, sperm function (such as sperm acrosome enzyme activity and other indicators) should also be normal, the female partner follicle development and ovulation is normal, the fallopian tube is smooth and normal function, the endometrium grows well, there is no disease that prevents sperm transport and fertilized egg implantation, embryo development, and, both parties have normal sexual function and moderate regular These are the basic conditions for conception. Therefore, couples who are planning to have two children should undergo relevant examinations as early as possible. The most basic examinations for the male partner should include sperm concentration, sperm vitality, sperm morphology and sperm acrosomal enzymes, while the most basic examinations for the female partner include routine gynecological examinations, ovulation monitoring, tubal lavage or imaging, and both partners should be examined for reproductive system infections, especially specific infections such as mycoplasma and chlamydia, so that they can be conditioned and treated in a timely manner. The examination should include routine gynecological examination, ovulation monitoring, tubal lavage or ultrasound.