Aim Aim To evaluate multi-ethnic participants' feedback from the Healthy Mums and Babies (HUMBA) trial. Methods Methods In conjunction with the HUMBA trial, a survey of dietary educational preferences (provided by community health workers (CHWs) and supported by text messages) or routine dietary advice with probiotic or placebo capsules was conducted in a multi-ethnic sample of pregnant women with obesity residing in an area of high deprivation in South Auckland, New Zealand (NZ). Results Results Of 230 participants, median BMI was 38.6 kg/m 2 , 22% were Māori, 49% Pacific and 64% in highest deprivation quintile. Over 80% completed the survey. Participants reported overall-experience was positive (92%); capsules easy to take (80%); if probiotics improved health, they would recommend to a friend (97%). Participants in dietary intervention reported input by CHWs helped: change their food intake (70%); eat healthy (73%); set goals to change diet (62%); keep to recommended weight-gain (63%); and would recommend intervention to a friend (82%). Participants reported text messages: were read (93%); helped them eat healthy (65%); messages from baby was a good idea (79%) and would recommend to a friend (79%). Satisfaction with CHW was not related to weight-gain or birthweight. Conclusions Conclusions In this high needs' population, feedback of participation in the HUMBA trial was very positive. The dietary intervention provided by CHWs was valued. Obesity is a global epidemic. The World Health Organisation reported that obesity worldwide has tripled since 1975. 1 In 2016, over 650 million adults (>18 years) were obese, and 41 million children (age 5-19) were overweight or obese. 1 The Organisation for Economic Cooperation and Development countries 2017 Obesity Update ranked United States of America as the first and NZ as the third most obese nations in 2015. 2 The 2018/2019 New Zealand Health Survey reported 31% adults (>15 years) and 11.3% children (2-14 years) were obese with highest rates among Pacific adults (Pacific is an ethnic or racial term to explain people of the Pacific Islands) and Māori (Indigenous people of New Zealand) compared with European/Other and Asian (66.5%, 48.2%, 29.1%, 13.8%, respectively). Counties Manukau Health (CMH) in South Auckland, NZ is an area of high deprivation and home to multi-ethnic populations with high rates of obesity in pregnancy, with rates in Pacific, Māori, European, Indian, Chinese and Asian/Other of 65%, 45%, 26%, 13%, 4% and 6%, respectively. 3 Obesity during pregnancy is a risk factor for most pregnancy complications including gestational diabetes, preeclampsia, caesareans, difficult or assisted births; and in the Okesene-Gafa K, McCowan L, McKinlay C, et al. Experiences of a multi-ethnic population with obesity receiving dietary interventions and probiotics in pregnancy, from the Healthy Mums and Babies randomised trial.