One in eight women and one in 10 men in the U.K. have experienced infertility, struggling to get pregnant for at least a year, and almost half do not seek help for the problem, according to a new study. "Our finding of inequalities in help seeking between those who are better educated and in higher status jobs is (perhaps) not surprising given evidence of unequal distribution of wealth and power and the associated differential access to health care," said lead author Jessica Datta of the London School of Hygiene and Tropical Medicine.

The researchers used data on about 15,000 adult men and women up to age 74 who participated in Britain's third National Survey of Sexual Attitudes and Lifestyles between 2010 and 2012. Almost 13 percent of women and 10 percent of men said they had experienced a period of infertility at some point. This was reported more often by those who were married or cohabitating at the time of the study, likely because these couples were more likely to have attempted pregnancy and discovered a fertility issue, the authors write. "We don't know why the period of infertility occurred" or whether these people were ever able to conceive or become parents, Datta told Reuters Health by email.

Those who had children after age 35 were more likely to report a period of infertility than those who had children before age 25. For those who experienced infertility, 57 percent of women and 53 percent of men said they had sought help at some point. Those with higher education levels and who had become parents at older ages were more likely than others to have sought help, the researchers reported in Human Reproduction.