A study showed that women who work at companies with higher incomes and less gender wage gap are more likely to choose childbirth. This is a result that overturns the traditional economic theory that as women's wages rise, the opportunity cost of raising children increases and the birth rate decreases. It is pointed out that alleviating the gender gap in the labor market could be a solution to the low birth rate problem. According to a recent report by the Korea Employment Information Service on ‘The Effect of Labor Market Structure on Low Birth Rate’, it was analyzed that the higher the wage (relative wage) of women compared to the average wage of men, the higher the probability of women choosing to have children. Additionally, the higher a woman's wage, the higher the probability of her choosing to have children. To examine the impact of the gender wage gap on childbirth, the researchers compared female workers' earnings a year before giving birth to men's wages at the workplace they worked at at the time. However, it was analyzed that after giving birth, women's relative wages fall sharply and it is difficult to recover to the relative wages just before giving birth for a certain period of time. The relative wage of women in the year of childbirth is