Introduction With the development of society, more and more women are beginning to pursue a balance between career and family, and to a certain extent, they are also delaying childbirth. So, can a 45-year-old woman successfully give birth to a second child? This is a matter of great concern. Age factor First of all, a woman\’s age has a very important impact on having a second child. Generally speaking, a woman\’s fertility gradually declines with age. At the age of 45