New WHO Knowledge Portal Promotes Inclusion of Pregnant and Lactating Women in Clinical Trials

According to the World Health Organization, a new knowledge portal is being launched to support the inclusion of pregnant and lactating women in clinical trials. The resource is intended for researchers, regulators, ethics committees, product developers and other stakeholders. For oral-health research, its relevance is methodological: evidence about medicines and preventive interventions is less useful when groups who may use them are routinely absent from trials.

The evidence gap the portal addresses

The WHO says pregnant and lactating women have historically been excluded from clinical research. That has left gaps in evidence about the safety and efficacy of medicines and vaccines used during pregnancy and breastfeeding, contributing to uncertainty in clinical decisions and off-label use.

Exclusion does not remove the risks of treatment, the organization notes. It can shift decisions into real-world care, where evidence is limited. The portal is intended to bring together ethical, scientific and operational resources for responsible inclusion, while safeguarding women and infants.

That distinction matters when assessing claims about oral-health products or care during pregnancy and lactation. A study that does not include these populations cannot, on its own, establish how its findings apply to them. The absence of trial data is not evidence of either safety or harm.

What to check in a study

The portal is described as a resource for stakeholders; the available WHO material does not specify a checklist or particular trial requirements. Readers reviewing oral-health research can still distinguish what a study directly measured from what authors infer for pregnant or lactating patients.

Relevant questions include whether those populations were eligible, whether they were enrolled, and whether outcomes were reported separately. If they were excluded, conclusions about them should be treated as unresolved rather than assumed from results in other participants.

The WHO frames inclusion as a matter of research ethics and public health, with the condition that studies be conducted safely and ethically. The portal’s stated purpose is to support that work, not to establish that every intervention has already been adequately studied in these groups.

What remains to be established

The announcement says the portal will introduce its purpose, scope and practical application, and provide space for stakeholder discussion about implementation in different contexts. It does not identify specific oral-health studies, products or clinical recommendations, and it provides no evidence that the portal has changed trial practice.

For readers following preventive dentistry, the practical signal is therefore limited but relevant: check whether evidence actually includes the population to which a recommendation is being applied. The broader question, how consistently the new resources translate into representative trials and usable results, remains open.