Could Having Kids Lead To More Job Opportunities?

I was taking a survey a few months ago, when I came across a question: How has having children affected your career? The choices were along the lines of "a huge impact," "a fair amount," "a small amount" or "not at all." Assuming that this question was assessing the degree of negative impact, I answered "a small amount." That seemed fair -- there are certainly parts of my work life that are less efficient because I have kids.