'Infertile' women may just need longer to conceive
One-in-four women with a history of infertility may still end up having a baby without treatment, a new SPH study shows.
The study by researchers at the School of Population Health and UQ's Centre for Clinical Research reveals that women who have been clinically diagnosed as infertile after 12 months of unsuccessfully trying for a baby may actually just need longer to conceive.
"Many women aged up to 36 years with a history of infertility, especially those who have already had a baby, can achieve spontaneous conception and live birth without using fertility treatment, indicating they are sub-fertile, rather than infertile," said the study's lead author, Dr Danielle Herbert.
The study shows one-in-four Australian women aged 28-36 years who reported a history of infertility had a baby without using fertility treatment and a further one-in-four had a baby after undergoing fertility treatment, which included IVF or fertility hormones, such as Clomid. Half of those women who had not used treatment had already had a baby prior to reporting infertility.
Dr Herbert said the national study, which appears in the journal Fertility and Sterility, offers a more complete picture of infertility in Australia, compared to previous clinic-based studies.
"The strength of this study is the inclusion of all women with a self-reported history of infertility," Dr Herbert explains.
"That means that women who have experienced difficulty falling pregnant but not sought treatment are included as well as women who do seek treatment but do not become pregnant."
The research is part of the Australian Longitudinal Study on Women's Health which has followed more than 8,000 women since 1996. This latest data comes from surveys conducted in 2006 and 2009.
For women who did have a baby, there was no difference in pregnancy complications -- including stillbirths or premature births -- between those who did and those who didn't use fertility treatment. Women who received fertility treatment were more likely to have twins.
Dr Herbert said that while the study has its limitations -- researchers do not know if women changed male partners during the study period -- it provides important evidence that can help doctors decide when best to start patients on fertility treatment.
"These findings are particularly encouraging for women aged up to 36 years who have previously had a baby, or been diagnosed with unexplained infertility -- that is, the woman is ovulating regularly and her partner is making good quality sperm -- to persevere to conceive without treatment. "
More information:
Dr Danielle Herbert
T: 07 3346 5223
