More than 8 million children are born worldwide following treatment with assisted reproductive technologies (ART) (Fauser, 2019), which corresponds to 3–5% of children born each year (Wyns et al., 2020), and child health remains a concern for reproductive specialists. Expansion of the policy of single embryo transfer following IVF has led to a reduction in complications induced by multiple pregnancies (Bergh et al., 2020; Spangmose et al., 2020). Nevertheless, perinatal outcomes following a single pregnancy obtained by ART appear to be less favourable than in natural conception (Pandey et al., 2012), and could depend on the technique used.