Many scientists at top US institutions have had fewer children than they wanted as a result of their careers, according to a new study.

Nearly half of all female scientists and a quarter of male scientists said they would have liked more children — and a quarter of both women and men said they are likely to consider moving to a career outside science as a result.

Sociologists Elaine Howard Ecklund from Rice University and Anne Lincoln from Southern Methodist University surveyed 2,500 scientists at more than 30 leading universities in the United States for the study, which was published last week in PLoS ONE.

The survey showed that 36 percent of male postdocs and 22 percent of female postdocs had children, rising to 75 percent of male faculty members and 64 percent of female faculty members. Female faculty members had fewer children on average than their male colleagues — 1.2 children for women versus 1.5 for men.

Despite women being more likely to have wanted more children, men were unhappier about having fewer children than desired. Both men and women with children worked fewer hours than those without children. However, contrary to the researchers’ expectations, women with children worked the same number of hours as men with children — approximately 54 hours a week on average.

“Academic science careers are tough on family life,” says Ecklund, citing long hours and the pressures of working towards tenure as the main pressure points. She and Lincoln suggest on-site day care and improved mentoring programmes may help improve scientists’ work-life balance. “Universities would do well to re-evaluate how family-friendly their policies are,” says Ecklund.

What’s your reaction? Are you putting off having children as a result of your career? Is the situation similar outside the United States? Share your thoughts below.