• Verity Chadwick, Michaela Kim, Georgia Mills, Catherine Tang, Antoinette Anazodo, Rachel Dear, Rachael Rodgers, Orly Lavee, Sam Milliken, Georgia McCaughan, and Nada Hamad.
• Women's and Babies Service, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia.
• Intern Med J. 2023 Nov 6.

BackgroundChemotherapy is potentially harmful to a developing foetus, and there are limited data on the foetal impact of chemoimmunotherapy (CIT). Therefore, determining pregnancy status prior to initiation of CIT should be standard of care.AimsTo determine how many women of childbearing age are tested for pregnancy prior to immunochemotherapy administration.MethodsA retrospective chart review at a large Australian metropolitan cancer referral centre, including 304 women aged 18-51 years with a diagnosis of cancer receiving outpatient-based CIT between 1 May 2015 and 12 June 2020. We assessed the uptake of pregnancy screening and contraception counselling prior to and during first-line CIT.ResultsOnly 17.3% of CIT cycles (n = 416) screened patients for pregnancy no more than 90 days prior to administration, and the median time between pregnancy screening and treatment was approximately 3 weeks. One patient with early breast cancer had a spontaneous miscarriage estimated at 3-4 weeks' gestation, and neither the patient nor the treating oncologist was aware of this event. This was also the only patient who had a pregnancy test beyond the first cycle of CIT during their treatment.ConclusionsOur results highlight a concerningly low rate of pregnancy screening in women of childbearing age receiving CIT. The implication of missing a positive pregnancy test in this group of women could result in foetal complications, accidental miscarriage, potential bleeding risks and avoidable psychosocial stress. This highlights the urgent need for guidelines to mandate pregnancy testing in women of childbearing age receiving CIT and evidence-based implementation tools.© 2023 The Authors. Internal Medicine Journal published by John Wiley & Sons Australia, Ltd on behalf of Royal Australasian College of Physicians.

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